What Are Mouth Ulcers?
Mouth ulcers are small sores that can develop on the soft tissues inside your mouth. They may appear on the tongue, inside the cheeks or lips, on the gums, or on other areas of the oral tissues.
A mouth ulcer may look like a small round or oval sore with a white, yellowish or grey centre and a reddish border. Some ulcers are barely noticeable, while others can be painful enough to make eating, drinking or speaking uncomfortable.
Most minor mouth ulcers are temporary and heal without specific treatment. However, mouth ulcers treatment may be necessary when the ulcers are particularly painful, keep coming back, occur frequently or fail to heal within the expected period.
If you frequently experience mouth ulcers, understanding the possible causes can help you decide when self-care is enough and when a dental examination is appropriate.
At Skyline Dental – Multispeciality & Aesthetic Centre in Nallurhalli, Whitefield, Bengaluru, we evaluate persistent or recurring oral sores and help identify whether they are related to local irritation, dental problems or another underlying cause.
What Causes Mouth Ulcers?
There isn’t always one obvious cause of a mouth ulcer.
Common triggers can include:
- Accidental biting of the cheek or lip
- A sharp tooth
- A broken or rough filling
- Braces or dental appliances rubbing against the tissues
- Minor injuries from hard or sharp foods
- Stress or tiredness
- Certain nutritional deficiencies
- Hormonal changes
- Some medications
- Underlying medical conditions
Sometimes, mouth ulcers develop without an identifiable trigger.
This is why recurring ulcers should be considered in the context of your overall oral and general health.
Can Biting Your Cheek Cause a Mouth Ulcer?
Yes.
Accidentally biting the inside of your cheek or lip can injure the delicate oral tissue. The injured area may subsequently develop into a painful ulcer.
Other sources of repeated irritation can include:
- Sharp edges of broken teeth
- Rough fillings
- Broken dental restorations
- Ill-fitting dentures
- Orthodontic brackets
- Habitual cheek biting
If an ulcer repeatedly develops in exactly the same location, it is worth checking whether something is continuously irritating the area.
A dentist can examine the tooth or dental restoration and address the source of irritation when appropriate.
Can Stress Cause Mouth Ulcers?
Stress may be associated with recurring mouth ulcers in some people.
Patients sometimes notice that ulcers appear during periods of:
- Increased work pressure
- Poor sleep
- Emotional stress
- Fatigue
- Changes in routine
However, stress is not necessarily the only cause.
If ulcers are frequent, unusually severe or persistent, it is better to look beyond stress and consider other possible contributing factors.
Can Nutritional Deficiencies Cause Mouth Ulcers?
Certain nutritional deficiencies may be associated with recurrent oral ulcers.
These can include deficiencies involving nutrients such as:
- Iron
- Vitamin B12
- Folate
However, not every mouth ulcer means that you have a nutritional deficiency.
If you experience recurring mouth ulcers, particularly if they are frequent or accompanied by other symptoms, your doctor may recommend appropriate blood tests based on your history.
Avoid taking high-dose supplements solely because you have an occasional ulcer unless a healthcare professional has identified a need.
Why Do Mouth Ulcers Hurt So Much?
Even a very small ulcer can be surprisingly painful.
This is partly because the mouth is constantly exposed to movement and friction. Eating, speaking, brushing and swallowing can repeatedly irritate the affected area.
Foods that are:
- Spicy
- Very salty
- Acidic
- Extremely hot
- Rough or crunchy
may make an ulcer feel more painful.
For this reason, managing irritation is an important part of mouth ulcer treatment.
How Long Do Mouth Ulcers Take to Heal?
Most minor mouth ulcers heal naturally within one to two weeks.
The exact healing time can vary depending on the size of the ulcer, its location and whether the area continues to be irritated.
If an ulcer is taking unusually long to heal, repeatedly appears in the same place or continues to worsen, it should be examined by a dentist or doctor.
A persistent oral ulcer should not simply be treated repeatedly at home without identifying why it isn’t healing.
What Is the Best Mouth Ulcers Treatment?
The appropriate mouth ulcers treatment depends on the cause and severity.
For a small, uncomplicated ulcer, treatment is often focused on reducing irritation and controlling discomfort while the ulcer heals.
Your dentist may recommend appropriate measures such as:
Protecting the Area
Avoid foods that repeatedly irritate the ulcer.
Maintaining Oral Hygiene
Continue brushing your teeth gently. Avoid completely stopping oral hygiene because of the ulcer.
Managing Pain
Depending on the situation, your dentist or healthcare professional may recommend an appropriate topical or oral medication for symptom relief.
Treating the Cause
If a sharp tooth, rough filling, denture or orthodontic appliance is repeatedly irritating the area, addressing the source may help prevent the ulcer from recurring.
For persistent or severe ulcers, treatment may be different depending on the diagnosis.
Can You Treat Mouth Ulcers at Home?
Many minor ulcers can be managed with simple supportive care while they heal.
You can try:
- Drinking plenty of water
- Choosing softer foods temporarily
- Avoiding spicy and acidic foods
- Avoiding very hot foods and drinks
- Using a soft toothbrush
- Maintaining regular oral hygiene
- Avoiding picking or biting the ulcer
Some people also use salt-water rinses for temporary comfort.
However, home care should not replace professional assessment when an ulcer is persistent, unusually large, frequently recurring or associated with other concerning symptoms.
Should You Put Salt Directly on a Mouth Ulcer?
It is generally better not to rub dry salt directly onto an ulcer.
This can irritate the tissue and increase discomfort.
If you want to use salt water as a supportive measure, dissolve an appropriate amount of salt in warm water and gently rinse rather than applying salt directly to the sore.
If the ulcer continues to be painful or does not heal, seek professional advice rather than repeatedly relying on home remedies.
Can a Sharp Tooth Cause Recurring Mouth Ulcers?
Yes.
A sharp or broken tooth can repeatedly rub against the cheek, tongue or lip.
Similarly, a rough dental filling, crown or denture may cause repeated trauma.
If your mouth ulcer consistently develops next to a particular tooth or dental appliance, don’t simply keep treating the ulcer.
The cause of the irritation needs to be addressed.
At Skyline Dental, your dentist can examine the area and determine whether a tooth, filling, crown, denture or other local factor is contributing to the problem.
When Should You See a Dentist for a Mouth Ulcer?
Most minor mouth ulcers are not an emergency.
However, you should consider a dental examination if:
- The ulcer does not heal
- Ulcers keep returning
- The ulcer is unusually large
- You have multiple ulcers
- Eating and drinking are becoming difficult
- The ulcer repeatedly occurs in the same location
- There is persistent bleeding
- You notice a lump or unusual thickening
- There is unexplained numbness
- You have persistent pain
A dentist can determine whether the ulcer appears consistent with a common minor ulcer or whether further investigation is appropriate.
When Is a Mouth Ulcer More Concerning?
A mouth sore that persists rather than healing normally deserves attention.
This does not mean that a persistent ulcer is automatically cancerous. There are many possible causes.
However, persistent oral ulcers or unusual lesions should be professionally assessed because early evaluation is important when an oral lesion does not behave as expected.
See a dentist or doctor promptly if you notice a sore that does not heal, particularly when accompanied by an unusual lump, persistent pain, unexplained bleeding, difficulty swallowing, or changes in sensation.
Are Mouth Ulcers Contagious?
Most common canker-type mouth ulcers are not contagious.
However, not every sore around the mouth is a typical mouth ulcer.
Certain viral infections, for example, can cause contagious sores around or inside the mouth.
This is one reason why the appearance, location and other symptoms matter when determining the cause.
If you are uncertain whether a sore is a typical mouth ulcer, have it examined rather than assuming that every oral sore has the same cause.
Mouth Ulcer vs Cold Sore: What’s the Difference?
The terms are sometimes confused.
A typical canker sore develops inside the mouth, while cold sores commonly occur around the lips and are associated with herpes simplex virus infection.
They have different causes and management.
If you have recurring sores around the lips or are unsure what type of lesion you have, a professional examination can help determine the likely cause.
Can Toothpaste Cause Mouth Ulcers?
Some people report irritation from certain toothpaste ingredients.
If you notice that mouth ulcers repeatedly appear after changing oral hygiene products, discuss this with your dentist.
However, toothpaste is only one possible factor among many.
Don’t stop brushing your teeth altogether because of recurring ulcers. Instead, discuss your symptoms with a dental professional and consider whether a gentler oral hygiene approach or alternative product would be appropriate.
How Can You Prevent Mouth Ulcers?
Not every mouth ulcer can be prevented, but you can reduce some common triggers.
Protect Your Mouth
Be careful when eating hard foods and avoid chewing objects that can injure the oral tissues.
Address Sharp Teeth
A chipped or fractured tooth can repeatedly traumatise the cheek or tongue.
Maintain Good Oral Hygiene
Regular brushing and cleaning between the teeth help maintain overall oral health.
Avoid Known Triggers
If you have identified specific foods or products that repeatedly irritate your mouth, reducing exposure may help.
Manage Stress and Sleep
Adequate rest and stress management may be useful for people who notice recurring ulcers during stressful periods.
Don’t Ignore Recurring Ulcers
Frequent ulcers deserve evaluation rather than repeated self-treatment without identifying the underlying cause.
Frequently Asked Questions About Mouth Ulcers
How can I get rid of a mouth ulcer quickly?
Most minor mouth ulcers heal naturally. Avoiding irritating foods, maintaining gentle oral hygiene and using appropriate pain-relieving treatments can make the healing period more comfortable.
What is the best mouth ulcers treatment?
There is no single treatment for every mouth ulcer. The best approach depends on the cause, size, location, frequency and duration of the ulcer.
Why do I keep getting mouth ulcers?
Recurring ulcers can be associated with local irritation, stress, nutritional deficiencies, medications or other factors. If ulcers frequently return, a dental or medical evaluation can help identify possible causes.
Is a mouth ulcer a sign of a vitamin deficiency?
Some nutritional deficiencies can be associated with recurring mouth ulcers, but an occasional ulcer does not automatically indicate a deficiency. Persistent recurrence may warrant appropriate evaluation.
Can a dentist treat mouth ulcers?
Yes. A dentist can examine the ulcer, look for local causes such as sharp teeth or irritating restorations, provide appropriate treatment when indicated and determine whether further evaluation is necessary.
How long should a mouth ulcer last?
Many minor mouth ulcers heal within one to two weeks. An ulcer that persists beyond the expected healing period should be professionally assessed.
Are mouth ulcers contagious?
Most typical canker-type mouth ulcers are not contagious. However, other types of oral sores can be caused by infections and may be contagious.
Should I worry about a mouth ulcer that doesn’t heal?
A persistent mouth ulcer should be checked by a dentist or doctor. It does not automatically mean something serious, but an oral lesion that does not heal normally should not be ignored.
Conclusion
Most mouth ulcers are temporary and heal without complicated treatment. However, recurring, unusually painful or persistent ulcers deserve attention.
Mouth ulcers treatment should ideally focus not only on relieving discomfort but also on identifying possible causes. A sharp tooth, damaged restoration, nutritional deficiency, repeated trauma or another underlying factor may need to be addressed when ulcers keep returning.
If you have a mouth ulcer that has not healed normally, keeps coming back or is accompanied by other unusual symptoms, schedule a dental examination rather than repeatedly treating it yourself.
At Skyline Dental – Multispeciality & Aesthetic Centre, Nallurhalli, Whitefield, Bengaluru, we provide comprehensive dental examinations and treatment for oral health concerns.
We welcome patients from Whitefield, Nallurhalli, Brookefield, AECS Layout, Kundalahalli, Siddapura, ITPL, Hope Farm and surrounding areas of Bengaluru.
Have a mouth ulcer that isn’t healing or keeps coming back? Book a dental consultation at Skyline Dental today and let us evaluate the cause and recommend the appropriate treatment.
