Mouth ulcers are small sores that form inside the mouth. These sores can appear on the lips, cheeks, gums, tongue, or the roof of the mouth. Mouth ulcers occur when the protective lining of the mouth breaks down. This exposes sensitive tissue underneath and makes the area painful. You may experience pain when eating or speaking if you have mouth ulcers.
For some people, mouth ulcers last only a few days, while for others the sores recur frequently and take longer to heal. Mouth ulcers are also linked to stress, minor injuries, food sensitivity, and medical conditions. Some ulcers are harmless and heal on their own. Others may point to an underlying problem that needs immediate attention. Knowing the types of ulcers, their causes, and the treatment options can help you manage pain and seek expert care when necessary.
Types of Mouth Ulcers
Mouth ulcers vary in appearance, cause, and severity. Some mouth ulcers are mild and generally heal quickly on their own. Other types of mouth ulcers are painful and persistent. Identifying the type of mouth ulcer can help determine proper care. Common types of mouth ulcers include:
Minor Aphthous Ulcers (Canker Sores)
Minor aphthous ulcers are the most common type of mouth ulcer. These ulcers affect many people at some point in their lives. They develop in the soft tissues inside the mouth. This includes the inner lips, the cheeks, or the underside of the tongue. Canker sores are often triggered by:
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Stress
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Minor injuries
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Hormonal changes
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Irritation from certain foods
This type of mouth ulcer is small and shallow. For most people, minor aphthous ulcers heal without medical treatment or scarring. The symptoms of canker sores include:
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Small, round, or oval sores inside the mouth
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White or yellow center with a red border
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Mild to moderate pain
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Increased sensitivity when eating spicy or acidic food
Major Aphthous Ulcers
Major aphthous ulcers are a more severe and less common form of canker sores. They are deeper, larger, and more painful than minor ulcers. These ulcers can appear anywhere inside the mouth. This includes the tongue and soft palate. These ulcers are sometimes linked to immune system disorders, chronic illness, or nutritional deficiencies.
Major aphthous ulcers can take several weeks to heal. Also, scarring may occur when the ulcer finally closes. The following are some symptoms you may notice when you have a major aphthous ulcer:
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Large, deep ulcers with irregular edges
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Severe and persistent pain
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Difficulty eating, drinking, or speaking
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Swelling and inflammation around the sore
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Slow healing that may leave scars
Herpetiform Ulcers
Herpetiform ulcers appear as clusters of many tiny sores and can look alarming when they first develop. These ulcers mainly affect adults, and they often appear on the tongue or the floor of the mouth. Multiple small ulcers may form a single, larger, painful lesion. Although herpetiform ulcers are uncomfortable, they heal within two weeks without scarring. Common symptoms of herpetiform ulcers include:
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Groups of tiny ulcers appear together
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Intense pain around the sores
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Burning or stinging sensation around the affected area
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Ulcers that may merge into larger sores
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Discomfort when chewing or swallowing
Traumatic Mouth Ulcers
Traumatic mouth ulcers result from physical injury to the mouth lining. An injury can happen from:
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Accidentally biting the cheek or tongue
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Irritation from braces or dentures
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Sharp or broken teeth
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Burns from hot foods and drinks
Traumatic mouth ulcers are not related to infection. Therefore, they recover shortly after the source of irritation is removed. The symptoms of traumatic ulcers include:
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A single ulcer at the site of injury
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Localized pain or tenderness
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Red or white sore surface
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Mild swelling around the affected area
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Pain that improves as healing begins
Oral Thrush
Oral thrush is a fungal infection caused by an overgrowth of yeast in the mouth. It commonly affects babies, older adults, and people with weakened immune systems. The condition can also develop after antibiotic use. The symptoms you may experience when you have oral thrush include:
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White or creamy patches on the tongue or inner cheeks
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Red, sore tissue that appears underneath the patches
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Burning or painful sensation around the affected area
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Cracking at the corners of the mouth
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Altered taste
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Difficulty swallowing
Unlike other mouth ulcers, oral thrush does not resolve on its own. Therefore, you will require antifungal treatment.
Viral Mouth Ulcers
Viral mouth ulcers are caused by viruses such as the herpes simplex virus. These ulcers are contagious and may occur inside the mouth or around the lips. After the first infection, the virus remains in the body and can reactivate during times of stress, illness, or fatigue. The symptoms of a viral mouth ulcer may include the following:
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Tingling or burning sensation before sores appear
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Small fluid-filled blisters
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Painful open ulcers after blisters burst
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Swollen lymph nodes
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Fever or general discomfort in some cases
Mouth Cancer Sores
Mouth cancer sores are not typical ulcers. Therefore, you should not ignore them. These ulcers develop due to abnormal cell growth in the mouth's tissues and do not heal on their own. These sores may appear on the tongue, gums, lips, or inside the cheeks. You may be at risk of developing these sores if you use tobacco or if you are a heavy alcohol consumer. Early detection can help ensure a successful treatment if cancer occurs. The symptoms of cancer sores that you should pay attention to include:
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A sore that does not heal after two weeks
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Persistent pain or numbness in the mouth
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Red or white patches that do not fade
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Thickening or lumps in the mouth tissue
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Difficulty chewing, swallowing, or speaking
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Unexplained bleeding in the mouth
Causes of Mouth Ulcers
There are several reasons why you can develop mouth ulcers. Most of these factors stem from lifestyle choices that are easy to overlook. They include:
Minor Mouth Injuries
Minor injuries inside the mouth are a common cause of ulcers. Biting the inside of your cheek while eating can break the delicate lining of the mouth. Braces, dentures, and sharp tooth edges can also rub against the tissue. Even brushing too hard with a stiff toothbrush can lead to minor cuts. When the skin breaks, bacteria can enter the area. This slows healing and increases soreness. The body responds to the injury by forming an ulcer. Ulcers from mouth injury heal within a week if you remove the source of irritation.
Stress and Hormonal Changes
Emotional stress can affect different parts of your body, including the mouth. When stress levels rise, the immune system can weaken. A weak immunity makes it harder for the mouth to heal properly. Many people notice mouth ulcers during dental examinations, work pressure, or emotional strain.
Hormonal changes can have a similar effect. Some people develop ulcers during their menstrual cycle or pregnancy. Hormones can affect blood flow and tissue repair in the mouth. As a result, minor irritations may turn into painful sores.
Nutritional Deficiencies
A lack of specific vitamins and minerals can increase the risk of developing mouth ulcers. A deficiency of the following elements can trigger mouth ulcers:
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Iron
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Vitamin B12
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Folic acid
These nutrients help maintain healthy skin and support healing. When the body lacks them, the mouth lining becomes fragile. In this case, you may suffer minor injuries that take longer to heal. People with poor diets or absorption problems are more at risk of developing mouth sores. You can reduce the recurrence of these sores by correcting the deficiency.
Food Sensitivities
Some foods often irritate the mouth and cause ulcers. These may include salty, acidic, and spicy foods. Sometimes the ulcers can also be caused by food allergies or sensitivities. These reactions inflame the mouth tissues. Inflamed tissues are more susceptible to damage than healthy ones. When you avoid these triggers, your risk of ulcers reduces.
Stress Management
Stress also affects the immune system, and it may trigger a mouth ulcer. High levels of stress can also slow the healing process and make ulcers more painful. Stress management promotes recovery and overall oral health.
Infections and Immune System Issues
Viral, bacterial, or fungal infections can cause mouth ulcers. For example, the herpes simplex virus leads to cold sores. A weakened immune system increases the risk of these infections. If you have conditions like HIV, autoimmune diseases, or ongoing illnesses, your body is less likely to heal. When immunity is low, you may develop larger and more painful ulcers.
Underlying Medical Conditions
Certain medical conditions increase the risk of recurring mouth ulcers. Digestive diseases such as celiac disease and Crohn’s disease can affect food absorption. This weakens the lining of the mouth over time. Autoimmune conditions may cause the immune system to attack intact mouth tissue.
In rare cases, persistent ulcers can be a sign of oral cancer. If you develop mouth ulcers that persist for more than 2 weeks, you should seek oral health care.
Treatments for Mouth Ulcers
Treating mouth ulcers involves several approaches. The proper treatment will depend on the cause, size, and frequency of the ulcer. They include:
Avoiding Irritation
Reducing irritation is the most crucial step in treating mouth ulcers. Hot, salty, and acidic foods can worsen pain and slow healing. Hard or crunchy foods can cause inflammation around the ulcer. You can start with foods such as yogurt, soup, and mashed vegetables. These foods are also less painful to eat and thus less irritating.
Also, you should use a soft toothbrush to protect sensitive tissue. Brushing gently prevents further injury to the sore area. Alcohol and tobacco often irritate the mouth tissues. Therefore, avoiding them can also promote faster healing.
Nutritional Supplements
Some mouth ulcers result from a vitamin or mineral deficiency. Therefore, you may need nutritional supplements to restore healthy tissue. A balanced diet with fruits, vegetables, lean proteins, and whole grains can be the start to healthier mouth tissues. When you correct the deficiencies, the ulcers become less frequent and less severe.
Adequate sleep allows the body to repair damaged tissue. You can use the following relaxation techniques to lower your stress levels:
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Deep breathing
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Stretching
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Light exercise
Reducing daily stress may also decrease how often mouth ulcers return.
Over-the-Counter Pain Relief
Pain relief improves comfort and makes daily activities easier. Your dentist can recommend topical oral gels, creams, and sprays to numb the ulcer for short periods. These can help before meals or conversations. Oral pain relievers may help when ulcers cause significant discomfort. These medications do not cure the ulcer. However, they reduce pain and make healing more manageable.
Steroid Treatments
A dentist can prescribe steroids if you have severe, long-lasting, or painful mouth ulcers. Topical steroid gels, pastes, or mouth rinses reduce inflammation in the affected area. Additionally, they control the immune response that contributes to tissue damage. This allows the ulcer to heal faster and with less pain. You can apply the steroids directly to the sore under medical guidance.
Antiseptic and Medicated Mouthwashes
Your dentist can prescribe medicated mouthwashes to keep the ulcers clean. Reducing bacteria in the mouth lowers the risk of infection, especially for larger sores. Some mouthwashes also contain anti-inflammatory ingredients that ease pain and swelling. You can use the rinses alongside other treatments. Regular use of antiseptic mouthwashes supports healing.
Immunosuppressant Medications
In severe or recurring cases, you may need immunosuppressant medications. These drugs calm an overactive immune system that attacks healthy mouth tissue. Your dentist can prescribe these medications when your mouth ulcers result from autoimmune conditions. These medications reduce immune-related inflammation. Immunosuppressants may have severe side effects. Therefore, you should take them under strict supervision.
Find Expert Dental Services Near Me
Mouth ulcers can affect your comfort and daily life. Some ulcers are caused by minor injuries or stress. Others are associated with nutrient deficiencies, infections, or diseases. Most ulcers are harmless and heal with little to no effort. Other types of ulcers can reflect severe medical conditions that need treatment.
The treatment for mouth ulcers includes avoiding irritants, reducing stress, and maintaining a healthy diet. Sometimes your dentist may prescribe over-the-counter remedies to relieve pain. For more severe or recurring ulcers, you may require prescription treatments. These include steroids, medicated mouthwashes, and immunosuppressant medications.
If you have ulcers that have persisted for the last two weeks, you should seek immediate care. Your dentist will evaluate your condition to rule out more serious issues and recommend a treatment plan. At Lasting Impressions Dental Spa, we provide safe, reliable oral health care for our patients. Call us today at 818-751-5100 from Encino, CA, to schedule your appointment.
