Mouth Ulcers: Symptoms, Diagnosis & Treatments
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What causes mouth ulcers? 25 possible conditions

Canker sores or mouth ulcers are normally small lesions that develop in the mouth or at the base of the gums. They can make eating, drinking, and talking uncomfortable. Read more

See a list of possible causes in order from the most common to the least.

1

Cold Sores

Cold sores are red, fluid-filled blisters that usually form near the mouth. Learn about cold sore causes, symptoms, treatment, and prevention.

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2

Mouth Sores

Mouth lesions are sores that can appear on any of the soft tissues of the mouth, including the lips, cheeks, gums, tongue, and floor and roof of the mouth.

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3

Tongue inflammation

Tongue inflammation

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4

Canker Sore

A canker sore, or aphthous ulcer is a mouth ulcer or sore that's open and painful. They're the most common type of mouth ulcer.

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5

Oral Thrush

Oral thrush occurs when a yeast infection develops inside your mouth. It's marked by white lesions on your tongue, inner cheeks, gums, palate, and/or tonsils.

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6

Herpes Simplex

The herpes simplex virus (HSV) is an infection that causes herpes, which are blisters that most commonly appear on the genitals or mouth.

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7

Hand, Foot, and Mouth Disease

Hand, foot, and mouth disease is a viral infection that's common in children. Learn about symptoms, causes, treatment, and prevention.

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8

Acute HIV Infection

Acute HIV infection occurs soon after someone is infected with HIV. Learn about acute HIV infection symptoms, diagnosis, treatment, and prevention.

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9

AIDS

There are many symptoms of the autoimmune disease HIV/AIDS, including persistent skin rashes, night sweats, and mouth sores.

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10

Oral Cancers

Oral cancer is a cancer that affects the tissues of the mouth and throat, one symptom of which may be a lump in the neck.

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11

Esophagitis

Esophagitis is inflammation of the esophagus that can be caused by acid reflux or certain medications. You may develop a sore throat or heartburn.

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12

Gum Disease (Gingivitis)

A severe case of gingivitis is marked by swollen, bleeding gums and swollen lymph nodes around the jaw, and neck.

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13

Lichen Planus

Lichen planus is a common skin rash that is not contagious. Common symptoms may include lesions in the mouth which may be painful or cause a burning sensation.

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14

Herpes Stomatitis

Recurrent herpes simplex labialis, also known as oral or orolabial herpes, is an infection of the mouth area caused by the herpes simplex virus. It is a common and contagious infection that spreads easily.

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15

Measles

Measles is a very contagious infection of the respiratory system. One of its several symptoms is a sore or swollen throat.

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16

Neutropenia

Neutropenia is an abnormally low level of neutrophils in the blood. Neutrophils are white blood cells produced in bone marrow and make up about 60% of blood.

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17

Syphilis

Syphilis is a sexually transmitted infection. It is caused by a type of bacteria known as Treponema pallidum. According to the Centers for Disease Control and Prevention, in 2006, more than 36,000 cases of syphilis wer...

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18

Reactive Arthritis (Reiter's Syndrome)

Reiter's syndrome produces inflammation, swelling, and pain in the joints due to infection elsewhere in the body. Symptoms include mouth ulcers, painful urination, and urethral discharge.

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19

Pemphigoid

Pemphigoid is a rare autoimmune disorder that most often affects the elderly. Lesions on the abdomen, arms, legs, and mucous membranes is a common symptom.

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20

Systemic Lupus Erythematosus

Systemic lupus erythematosus (SLE) is an autoimmune disease and the most common type of lupus. One of its common symptoms is a rash on the cheeks and nose called a "butterfly rash."

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This feature is for informational purposes only and should not be used to diagnose.
Please consult a healthcare professional if you have health concerns.
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