Canker Sore: Causes, Symptoms, Treatment, and How to Get Rid of It Fast
- Vet. Ebru ARIKAN
- Apr 22
- 14 min read
What Is a Canker Sore?
A canker sore, medically known as an aphthous ulcer, is a small, shallow lesion that develops on the soft tissues inside the mouth. Unlike many other oral conditions, canker sores are not contagious, and they typically appear on areas such as:
Inner lips
Inner cheeks
Under the tongue
Soft palate
Base of the gums
These ulcers usually present as:
A round or oval shape
A white, gray, or yellowish center
A red, inflamed border
Core Characteristics
Canker sores are one of the most common oral conditions worldwide. Most people will experience them at least once in their lifetime. Their defining features include:
Pain and tenderness, especially when eating, drinking, or speaking
A burning or tingling sensation before the sore appears
Localized inflammation without spreading to other parts of the body
Why They Hurt So Much
The pain associated with canker sores is often disproportionate to their size. This is because they expose underlying nerve endings in the oral mucosa. Everyday actions like:
can directly irritate the exposed area, intensifying discomfort.
Are Canker Sores Dangerous?
In most cases, canker sores are benign and self-limiting, meaning they heal on their own without medical treatment. However, they can sometimes signal underlying issues such as:
Nutritional deficiencies (e.g., B12, iron, folate)
Immune system dysfunction
Hormonal fluctuations
Chronic stress
Recurring or unusually large sores may require further evaluation.
How to Get Rid of a Canker Sore Fast
There is no instant cure for a canker sore, but the right approach can significantly reduce pain and shorten healing time. The goal is to:
Protect the ulcer from irritation
Reduce inflammation
Support faster tissue repair
Immediate Actions (First 24–48 Hours)
Early intervention can make a noticeable difference.
Rinse your mouth with warm salt water (2–3 times daily)
Avoid acidic, spicy, and salty foods
Switch to a soft-bristled toothbrush
Use a protective oral gel or patch to cover the sore
These steps help prevent the sore from worsening during the early stage.
Fast Pain Relief Strategies
Pain control is essential, especially during the peak stage.
Apply topical numbing gels (benzocaine or lidocaine)
Use cold therapy (ice chips held gently near the sore)
Drink cool fluids instead of hot beverages
These methods provide temporary relief, allowing normal eating and speaking.
Accelerating Healing
To promote faster recovery:
Use antimicrobial mouth rinses to reduce bacterial irritation
Apply barrier pastes that shield the ulcer
Ensure adequate intake of:
Iron
Folate
Zinc
If a deficiency is present, correcting it can dramatically reduce healing time and recurrence.
What to Avoid (Critical for Faster Healing)
Certain habits can delay recovery:
Smoking or tobacco use
Alcohol-based mouthwashes
Toothpastes containing sodium lauryl sulfate (SLS)
Repeated touching or irritation of the sore
Avoiding these factors is often just as important as treatment itself.
Realistic Expectation
Minor canker sores → Improvement within 3–5 days, full healing in 7–14 days
Severe cases → May take longer despite treatment
“Fast relief” means reducing pain quickly and preventing worsening, not instant disappearance.
Medical Treatments for Canker Sores
When canker sores are severe, persistent, or recurrent, medical treatment may be necessary. These therapies aim to reduce inflammation, control pain, and prevent complications.
1. Topical Corticosteroids
These are among the most effective treatments for reducing inflammation.
Applied directly to the sore
Decrease redness and swelling
Help shorten healing time
Commonly used for:
Major canker sores
Painful recurrent ulcers
2. Prescription Mouth Rinses
Specialized rinses may be recommended in more serious cases.
Contain anti-inflammatory or antimicrobial agents
Reduce irritation and secondary infection risk
Useful when multiple sores are present
3. Systemic Medications (Severe Cases Only)
In rare and severe cases, oral medications may be required.
Anti-inflammatory drugs
Immune-modulating treatments
Pain control medications
These are typically reserved for:
Chronic, recurrent ulcers
Underlying systemic disease
4. Treatment of Underlying Causes
If canker sores are linked to another condition, addressing the root cause is essential.
Examples:
Nutritional deficiencies → supplementation
Gastrointestinal disease → targeted therapy
Hormonal imbalance → medical management
Without treating the underlying issue, sores are likely to recur frequently.
5. When Medical Treatment Is Necessary
You should consider professional evaluation if:
The sore lasts longer than 2–3 weeks
Pain is severe and unmanageable
Sores appear frequently or in large numbers
There are additional symptoms (fever, fatigue, systemic signs)
Canker Sore vs Cold Sore: Key Differences You Must Know
One of the most common misconceptions is confusing canker sores with cold sores. While they may seem similar at first glance, they are fundamentally different in cause, location, and behavior.
Key Differences at a Glance
Feature | Canker Sore | Cold Sore |
Location | Inside the mouth | Outside the mouth (lips, nose) |
Cause | Non-infectious (immune, stress, trauma) | Viral (Herpes Simplex Virus - HSV-1) |
Contagious | No | Yes |
Appearance | Single ulcer with white/yellow center | Fluid-filled blisters that crust |
Pain Type | Localized burning/stinging | Tingling → blister → crusting |
Healing Time | 7–14 days (minor cases) | 7–10 days (with viral cycle) |
What Causes the Confusion?
The confusion typically arises because both conditions:
Cause discomfort in the oral region
Can be triggered by stress or illness
May appear suddenly
However, the key distinction lies in infection:
Canker sores are not caused by a virus and cannot spread from person to person.
Cold sores are caused by the Herpes Simplex Virus (HSV-1) and are highly contagious, especially during the blister phase.
Why This Difference Matters
Understanding the difference is critical for proper treatment:
Treating a cold sore as a canker sore may delay antiviral care
Assuming a canker sore is contagious can lead to unnecessary concern
Preventive strategies are completely different for each condition
Quick Self-Check
You’re likely dealing with a canker sore if:
The lesion is inside your mouth
There are no blisters, just a single ulcer
It’s not spreading
You’re likely dealing with a cold sore if:
It appears on your lip or around your mouth
It starts as a tingling sensation, then forms blisters
It crusts over and heals in stages
Types of Canker Sores
Canker sores are not all the same. They are classified into three main types based on their size, number, depth, and healing behavior. Understanding these types is important because severity, pain level, and treatment approach can differ significantly.
Minor Canker Sores (Most Common)
Minor aphthous ulcers account for the majority of cases.
Size: Usually smaller than 1 cm
Shape: Round or oval with a clear red border
Number: Typically 1–3 sores at a time
Pain Level: Mild to moderate
Healing Time: 7–14 days
Scarring: No
These sores are the classic type most people experience. They can be uncomfortable but usually heal on their own without leaving any trace.
Major Canker Sores (Severe Form)
Major aphthous ulcers are less common but significantly more serious.
Size: Larger than 1 cm
Depth: Deeper lesions that penetrate further into tissue
Number: Often 1–2, but can be multiple
Pain Level: Severe
Healing Time: Several weeks (sometimes up to 6 weeks)
Scarring: Yes, possible
These sores can interfere with:
Eating
Speaking
Daily oral hygiene
Because of their severity, medical evaluation is often necessary, especially if they recur frequently.
Herpetiform Canker Sores (Rare but Painful)
Despite the name, herpetiform ulcers are not related to herpes virus infections.
Size: Very small (pinpoint lesions)
Number: Dozens of tiny ulcers clustered together
Pattern: May merge into larger irregular ulcers
Pain Level: High due to multiple lesions
Healing Time: 7–14 days
This type is rare but can be extremely uncomfortable due to the high number of simultaneous sores.
Why Classification Matters
Identifying the type of canker sore helps determine:
Whether home treatment is enough
If medical intervention is needed
The expected healing time
Risk of recurrence or complications
For example:
Minor sores → usually self-limiting
Major sores → may indicate underlying health issues
Herpetiform → often linked to systemic triggers
What Causes Canker Sores?
Canker sores do not have a single cause. Instead, they develop due to a combination of triggers, often involving the immune system, environmental factors, and internal health conditions.
1. Local Trauma (One of the Most Common Triggers)
Physical irritation inside the mouth is a leading cause.
Accidental cheek or lip biting
Aggressive tooth brushing
Dental procedures
Braces or sharp tooth edges
Even minor trauma can trigger an ulcer in sensitive individuals.
2. Nutritional Deficiencies
Deficiencies in key nutrients can weaken the oral mucosa and immune response.
Vitamin B12 deficiency
Iron deficiency
Folate deficiency (Vitamin B9)
Zinc deficiency
These deficiencies are strongly associated with recurrent canker sores.
3. Immune System Response
Canker sores are believed to involve an abnormal immune reaction, where the body mistakenly attacks healthy oral tissue.
This explains why they are more common in people with:
Autoimmune tendencies
Chronic inflammation
Certain systemic diseases
4. Stress and Hormonal Changes
Psychological and physiological stress plays a major role.
Emotional stress (work, anxiety, lack of sleep)
Hormonal fluctuations (especially in women)
Stress can weaken immune defenses, making the mouth more vulnerable to ulcer formation.
5. Food Sensitivities and Dietary Triggers
Certain foods can irritate the oral lining or trigger inflammation.
Common triggers include:
Acidic foods (citrus fruits, tomatoes)
Spicy foods
Salty snacks
Chocolate (in some individuals)
Coffee
Toothpastes containing sodium lauryl sulfate (SLS) may also increase risk.
6. Underlying Medical Conditions
Recurrent or severe canker sores may be linked to systemic conditions such as:
Celiac disease
Inflammatory bowel disease (Crohn’s, ulcerative colitis)
Behçet’s disease
HIV/AIDS (in advanced immune suppression cases)
In these cases, canker sores are often a symptom rather than a standalone issue.
7. Genetic Predisposition
If family members frequently experience canker sores, your risk may be higher.
This suggests a genetic component affecting immune response and mucosal sensitivity.
Key Insight
Canker sores usually develop when multiple factors combine, such as:
Stress + nutritional deficiency
Minor trauma + immune sensitivity
Dietary trigger + underlying inflammation
This is why some people get them occasionally, while others experience frequent, recurring episodes.
Cost of Treating Canker Sores (US & EU)
The cost of treating canker sores can vary widely depending on severity, frequency, and treatment choice. Most minor cases require little to no medical expense, while recurrent or severe cases may involve ongoing costs.
Over-the-Counter (OTC) Treatments
For most people, treatment starts with non-prescription products.
Treatment Type | US Cost (USD) | EU Cost (EUR) | Notes |
Topical gels (benzocaine, lidocaine) | $5 – $15 | €5 – €12 | Temporary pain relief |
Antiseptic mouthwashes | $8 – $20 | €7 – €15 | Helps prevent infection |
Protective pastes (oral barrier creams) | $10 – $25 | €8 – €20 | Forms a protective layer |
Vitamin supplements (B12, iron, folate) | $10 – $30 | €8 – €25 | Useful if deficiency exists |
These are usually sufficient for minor canker sores, keeping total cost relatively low.
Prescription Treatments
In more severe or recurrent cases, a healthcare provider may prescribe stronger medications.
Treatment Type | US Cost (USD) | EU Cost (EUR) | Notes |
Corticosteroid oral gels | $20 – $60 | €15 – €50 | Reduces inflammation |
Prescription mouth rinses | $25 – $80 | €20 – €70 | For severe inflammation |
Pain-relief medications | $10 – $40 | €8 – €35 | For significant discomfort |
These treatments are often necessary for:
Major canker sores
Frequent recurrences
Severe pain interfering with eating or speaking
Medical Consultation Costs
If symptoms persist or worsen, professional evaluation may be needed.
Service | US Cost (USD) | EU Cost (EUR) |
General practitioner visit | $50 – $150 | €20 – €80 |
Specialist (dentist/dermatologist) | $100 – $300 | €50 – €150 |
Blood tests (nutritional deficiencies) | $50 – $200 | €30 – €120 |
Long-Term Cost Considerations
For individuals with recurrent canker sores, costs can accumulate due to:
Repeated medication purchases
Ongoing supplementation
Multiple doctor visits
Diagnostic testing
In such cases, identifying the root cause (e.g., deficiency or systemic condition) is more cost-effective than repeated symptom-based treatment.
Risk Factors That Increase Canker Sore Development
While canker sores can affect anyone, certain factors significantly increase the likelihood of developing them. These risk factors often interact with each other, making some individuals much more prone than others.
1. Age and Demographics
More common in teenagers and young adults
Frequency often decreases with age
Slightly more common in women, possibly due to hormonal influences
2. Chronic Stress and Lifestyle Factors
Stress is one of the most consistent triggers.
Mental stress (work pressure, anxiety)
Physical stress (fatigue, illness, lack of sleep)
Chronic stress can weaken the immune system, increasing susceptibility.
3. Poor Nutritional Status
Inadequate intake of essential nutrients increases risk.
Low Vitamin B12
Iron deficiency
Folate deficiency
Zinc deficiency
These deficiencies impair tissue repair and immune response, making ulcers more likely.
4. Oral Hygiene Habits
Certain habits can increase irritation and vulnerability:
Brushing too aggressively
Using hard-bristled toothbrushes
Toothpastes containing sodium lauryl sulfate (SLS)
Maintaining proper but gentle oral care is essential.
5. Food and Chemical Sensitivities
Some individuals are more sensitive to specific substances:
Acidic foods (citrus, vinegar-based foods)
Spicy foods
Artificial additives or preservatives
Certain oral care products
These can trigger or worsen ulcer formation.
6. Underlying Health Conditions
Certain medical conditions significantly increase risk:
Autoimmune diseases
Gastrointestinal disorders (e.g., Crohn’s disease)
Celiac disease
Immune system suppression
In these cases, canker sores are often recurrent and more severe.
7. Genetic Predisposition
A family history of canker sores increases likelihood.
If one or both parents are affected
Higher chance of recurrent episodes
This suggests a hereditary component in immune response and tissue sensitivity.
8. Hormonal Fluctuations
Hormonal changes can trigger outbreaks, especially in women.
Menstrual cycle
Pregnancy
Hormonal imbalances
These changes can influence inflammation and immune response.
9. Recent Illness or Immune Suppression
After infections or during periods of weakened immunity:
Viral illnesses
Chronic disease states
Recovery periods
The body becomes more vulnerable to ulcer formation.
Home Remedies for Canker Sores
Home remedies can be highly effective for managing mild to moderate canker sores. While they may not eliminate the ulcer instantly, they help reduce pain, limit irritation, and support faster healing.
Salt Water Rinse (Most Effective and Simple)
One of the most widely recommended remedies.
Mix 1 teaspoon of salt in a glass of warm water
Rinse for 20–30 seconds, then spit out
Repeat 2–3 times daily
Why it works:Salt helps reduce bacteria and inflammation, creating a cleaner environment for healing.
Baking Soda (Sodium Bicarbonate)
Useful for neutralizing acidity in the mouth.
Mix baking soda with a small amount of water to form a paste
Apply directly to the sore for a few minutes
Rinse gently afterward
Benefit:Helps balance pH levels and reduce irritation caused by acidic conditions.
Honey Application
Natural honey has antimicrobial and soothing properties.
Apply a small amount directly onto the sore
Repeat several times a day
Why it helps:Supports tissue healing and reduces inflammation while providing a protective layer.
Coconut Oil
Known for its anti-inflammatory and antimicrobial effects.
Dab a small amount onto the sore
Reapply 2–3 times daily
Benefit:Helps prevent secondary irritation and keeps the area moisturized.
Chamomile Tea Compress
Chamomile contains compounds that promote healing.
Brew chamomile tea and let the tea bag cool
Apply the tea bag directly to the sore
Effect:Soothes pain and may reduce inflammation.
Ice Application (Cold Therapy)
Simple but effective for pain control.
Hold an ice chip near the sore
Let it melt slowly
Benefit:Provides temporary numbness and reduces swelling.
Important Note on Home Remedies
Home treatments are best suited for:
Minor canker sores
Occasional outbreaks
They may be less effective for:
Large or deep ulcers
Frequent recurrences
Underlying systemic conditions
Foods That Trigger or Worsen Canker Sores
Diet plays a major role in both triggering and aggravating canker sores. Certain foods can irritate the oral lining, increase inflammation, or delay healing.
Acidic Foods
These are among the most common triggers.
Citrus fruits (orange, lemon, grapefruit)
Tomatoes and tomato-based products
Vinegar-containing foods
Effect:Increase acidity in the mouth, causing irritation and worsening pain.
Spicy Foods
Chili peppers
Hot sauces
Highly seasoned meals
Effect:Directly irritate exposed nerve endings, intensifying discomfort.
Salty and Crunchy Foods
Chips
Crackers
Salted nuts
Effect:Can physically irritate the ulcer surface and delay healing.
Chocolate (In Some Individuals)
Not a universal trigger, but commonly reported.
Possible reasons:
Sensitivity to certain compounds
Mild inflammatory response
Coffee and Caffeinated Beverages
Coffee
Strong tea
Energy drinks
Effect:May increase oral sensitivity and contribute to irritation.
Highly Processed Foods
Foods with artificial additives
Preservatives
Flavor enhancers
Effect:May trigger inflammatory responses in sensitive individuals.
Toothpaste and Hidden Triggers
Not a food, but important:
Toothpastes containing sodium lauryl sulfate (SLS)
Effect:Can irritate oral tissues and increase susceptibility to ulcers.
Foods That Help Heal Canker Sores Faster
Diet doesn’t just trigger canker sores — it can also actively support healing. Choosing the right foods can reduce irritation, promote tissue repair, and strengthen the immune response.
Soft and Non-Irritating Foods
These foods minimize friction and allow the sore to heal undisturbed.
Yogurt
Mashed potatoes
Oatmeal
Scrambled eggs
Smooth soups
Why they help:They are easy to chew and swallow, reducing mechanical irritation on the ulcer.
Vitamin-Rich Foods (Especially B Vitamins)
Deficiencies in certain vitamins are strongly linked to canker sores.
Leafy greens (spinach, kale)
Eggs
Dairy products
Whole grains
Key nutrients:
Vitamin B12
Folate (Vitamin B9)
These nutrients support cell regeneration and mucosal healing.
Iron-Rich Foods
Iron plays a crucial role in tissue repair.
Red meat
Lentils
Beans
Spinach
Benefit:Improves oxygen delivery to tissues, accelerating healing.
Zinc-Rich Foods
Zinc is essential for immune function and wound healing.
Pumpkin seeds
Nuts
Whole grains
Meat and seafood
Effect:Supports faster tissue repair and reduces inflammation.
Cooling and Hydrating Foods
Keeping the mouth hydrated and cool can reduce discomfort.
Cucumber
Watermelon
Milk
Smoothies (non-acidic)
Benefit:Soothes irritation and helps maintain a stable oral environment.
When to See a Doctor for a Canker Sore
Most canker sores are harmless and resolve on their own. However, certain situations require professional evaluation to rule out more serious conditions.
Duration Longer Than Normal
A typical canker sore heals within 7–14 days
If it lasts longer than 2–3 weeks, it should be evaluated
Why it matters:Delayed healing may indicate:
Infection
Immune-related issues
Underlying disease
Severe Pain or Large Ulcers
Seek medical attention if:
Pain is intense and persistent
The ulcer is unusually large or deep
Eating and drinking become difficult
These may indicate major canker sores or complications.
Frequent Recurrence
If canker sores appear often:
Multiple times per month
In repeated cycles
This may suggest:
Nutritional deficiencies
Chronic stress
Systemic conditions
Multiple Sores at the Same Time
Numerous ulcers appearing simultaneously
Clusters of small lesions
This pattern may require further investigation, especially if recurrent.
Additional Systemic Symptoms
Seek evaluation if canker sores are accompanied by:
Fever
Fatigue
Swollen lymph nodes
Digestive issues
These signs may point to underlying systemic disorders.
Difficulty Eating or Drinking
If the sore interferes with:
Hydration
Medical support may be needed to prevent complications.
Prevention Tips: How to Avoid Canker Sores
Preventing canker sores is not always possible, but the frequency and severity can be significantly reduced by controlling triggers and supporting overall oral health.
Maintain Gentle but Effective Oral Hygiene
Use a soft-bristled toothbrush
Brush gently to avoid damaging oral tissues
Floss carefully without injuring the gums
Choose toothpaste without sodium lauryl sulfate (SLS)
Why it matters:Reducing mechanical irritation lowers the chance of triggering ulcers.
Manage Stress Effectively
Stress is one of the strongest triggers.
Improve sleep quality
Maintain a balanced daily routine
Use stress-reduction techniques (e.g., breathing exercises, physical activity)
Impact:Better stress control helps stabilize immune responses.
Optimize Nutrition
Ensure consistent intake of key nutrients:
Vitamin B12
Iron
Folate
Zinc
If deficiencies are suspected, dietary adjustments or supplementation may be necessary.
Identify and Avoid Personal Triggers
Each individual may have unique triggers.
Common ones include:
Acidic foods
Spicy meals
Certain processed foods
Strategy:
Track food intake before outbreaks
Eliminate or reduce identified triggers
Protect the Oral Mucosa
Prevent small injuries that can lead to ulcers.
Avoid chewing on hard objects
Be cautious when eating crunchy foods
Address sharp teeth or dental appliances
Stay Hydrated
Adequate hydration helps maintain a healthy oral environment.
Drink water regularly
Avoid excessive caffeine and alcohol
Regular Health Monitoring
If canker sores are frequent:
Check for nutritional deficiencies
Evaluate for underlying conditions
Preventive care is more effective than repeated treatment.
Are Canker Sores a Sign of a Serious Disease?
In most cases, canker sores are harmless. However, in certain situations, they can be a warning sign of underlying health issues.
When They Are Usually Harmless
Occur occasionally
Heal within 1–2 weeks
Appear as small, isolated ulcers
These cases are considered normal and self-limiting.
When They May Indicate a Deeper Issue
Recurrent or severe canker sores can be associated with:
Nutritional deficiencies
Vitamin B12
Iron
Folate
Gastrointestinal diseases
Celiac disease
Crohn’s disease
Ulcerative colitis
Autoimmune conditions
Behçet’s disease
Lupus
Immune suppression
Chronic illness
Advanced infections
Warning Signs to Watch For
You should take canker sores more seriously if:
They are large, deep, or unusually painful
They persist longer than 2–3 weeks
They occur very frequently
They are accompanied by:
Fever
Fatigue
Digestive symptoms
Skin or eye issues
These signs suggest that the sores may be part of a broader systemic problem.
Why This Matters
Ignoring persistent or severe canker sores may delay the diagnosis of:
Chronic inflammatory diseases
Nutritional disorders
Immune-related conditions
Early evaluation can lead to:
Faster diagnosis
More effective treatment
Prevention of complications
Canker Sores in Children vs Adults
Canker sores can affect both children and adults, but their frequency, triggers, and severity patterns may differ depending on age and overall health.
Canker Sores in Children
Canker sores are quite common in children, especially during periods of growth and immune development.
Common characteristics:
Usually minor type (small and self-limiting)
Heal relatively quickly (within 7–10 days)
Often triggered by:
Minor oral injuries (biting the cheek, brushing too hard)
Nutritional gaps
Viral illnesses or temporary immune weakness
Children may experience:
Increased discomfort due to sensitivity
Difficulty eating or drinking
Irritability due to pain
Important consideration:Children may have trouble describing symptoms clearly, so caregivers should monitor:
Eating behavior
Hydration
Frequency of recurrence
Key Differences
Factor | Children | Adults |
Frequency | Occasional | May be recurrent |
Severity | Usually mild | Can be moderate to severe |
Common Cause | Trauma, temporary immune changes | Stress, deficiencies, systemic factors |
Healing | Faster | May take longer if recurrent |
Risk of underlying disease | Lower | Higher (in chronic cases) |
How Long Do Canker Sores Last?
The duration of a canker sore depends on its type, severity, and underlying factors. Most follow a predictable healing timeline, but variations can occur.
Typical Healing Time
Minor canker sores:
Heal within 7–14 days
No scarring
Major canker sores:
May last 2–6 weeks
Possible scarring
Herpetiform sores:
Heal within 7–14 days, but may appear in clusters
Factors That Affect Healing Time
Healing speed can vary depending on:
Immune system strength
Nutritional status
Ongoing irritation (food, brushing, habits)
Presence of underlying conditions
What Slows Down Healing?
Certain factors can delay recovery:
Continuous irritation (acidic or spicy foods)
Poor oral hygiene
Smoking or alcohol use
Untreated nutritional deficiencies
What Speeds Up Healing?
Early treatment (rinses, protective gels)
Avoiding triggers
Proper nutrition
Maintaining oral hygiene without irritation
When Healing Takes Too Long
If a canker sore:
Persists beyond 2–3 weeks
Does not improve over time
Worsens instead of healing
It may require medical evaluation to rule out:
Infection
Chronic inflammatory conditions
Systemic disease
Keywords
canker sore, mouth ulcer treatment, canker sore causes, how to get rid of canker sore fast, aphthous ulcer
Sources
Source | Link |
Mayo Clinic | |
Cleveland Clinic | |
National Health Service (NHS) | |
American Dental Association (ADA) | |
Mersin VetLife Veterinary Clinic |
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