Mouth Ulcer

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Medically Reviewed By:

Sanshiro Kato

Sanshiro Kato, MD

Emergency department

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People with these symptoms also use Ubie's symptom checker to find possible causes

  • Ulcers in the mouth but they don't hurt

  • Sores in the mouth but they don't hurt

  • Oral ulceration

  • Painless mouth erosion

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Content updated on Sep 6, 2022

About the symptom

An oral ulcer is a sore that develops in the soft tissue lining of the gums, tongue, inner cheeks, lips or palate.

When to see a doctor

Seek professional care if you experience any of the following symptoms

  • Disorder of consciousness

  • Altered mental status (delirium)

  • Visual field defect

  • Seizure attack

  • Impossible to walk normally

  • Repeated fever above 38 ℃

  • Head injury

  • Fainting with loss of consciousness

  • Involuntary movements

Possible causes

  • Viral mucositis

  • Candidiasis (oral, hands and feet)

    Normal human skin contains bacteria and fungi. Candidiasis happens when the fungus overgrows and invades the skin. Risk factors include warm moist environments, and a weakened immune system.

  • Stomatitis

    Inflammation of the mouth surface produces ulcers. The causes are varied, including vitamin deficiencies, medications, and autoimmunity (body's own immune system attacking itself). Often, no clear cause is found and the ulcers heal by themselves.

  • Behcet's disease
  • Crohn's disease
  • Ulcerative colitis
  • Gonorrhea

Related serious diseases

  • Epilepsy

    Epilepsy is a neurological disorder where brain activity becomes abnormal. This can cause seizures of varying lengths of time and severity. Epilepsy can affect people of any age and may occur due to genetic disorders or brain injury such as stroke.

  • Acute HIV infection
  • Chronic subdural hematoma

Questions your doctor may ask about this symptom

Your doctor may ask these questions to check for this symptom

  • Do you have sores or erosions in your mouth?

  • Do you have itchy skin?

  • Do you have any pain or tingling in the affected areas of the skin?

  • Do you have skin redness?

  • Do you have a fever?

Other Related Symptoms

Similar symptoms or complaints

Medically Reviewed By:

Sanshiro Kato

Sanshiro Kato, MD

Emergency department

From our team of 50+ doctors

Just 3 minutes.
Developed by doctors.

Ubie is supervised by 50+ medical experts worldwide

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