Mouth Ulcer
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Reviewed By:

Luri Lee, DMD

Luri Lee, DMD (Dentistry)

Dr. Luri Lee graduated from Boston University with a Bachelor of Arts in Psychology and Biology. She then continued her education at Boston University Henry M. Goldman School of Dental Medicine where she graduated Summa Cum Laude and was inducted into the Omicron Kappa Upsilon National Dental Honor Society. During her time in dental school, Dr. Lee was the recipient of the Spencer N. Frankl Scholarship for her strong academic performance and active participation in the school and community. Following dental school, Dr. Lee stayed at Boston University to complete a one year Advanced Education in General Dentistry residency program. In 2020 Dr. Lee was recognized among the “10 Under Ten” by the Massachusetts Dental Society for her contributions to the dental community and her volunteer work in Panama. Dr. Lee is licensed to practice in Massachusetts and is a member of the American Dental Association, Massachusetts Dental Society and Academy of General Dentistry.

Yoshinori Abe, MD

Yoshinori Abe, MD (Internal Medicine)

Dr. Abe graduated from The University of Tokyo School of Medicine in 2015. He completed his residency at the Tokyo Metropolitan Health and Longevity Medical Center. He co-founded Ubie, Inc. in May 2017, where he currently serves as CEO & product owner at Ubie. Since December 2019, he has been a member of the Special Committee for Activation of Research in Emergency AI of the Japanese Association for Acute Medicine. | | Dr. Abe has been elected in the 2020 Forbes 30 Under 30 Asia Healthcare & Science category.

From our team of 50+ doctors

Content updated on Mar 7, 2024

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

  • Ulcers in the mouth but they don't hurt

  • Sores in the mouth

  • Sores in the mouth but they don't hurt

  • Oral ulceration

  • Painless ulcers in my mouth

  • Painless sores in my mouth

  • Mouth ulcers

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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

Generally, Mouth ulcer can be related to:

  • Behcet's disease

    A rare autoimmune disease that causes inflammation in blood vessels throughout the body. Symptoms may include mouth and genital sores, as well as eye inflammation. As the disease progresses, joints and internal organs could also be affected.

  • Stomatitis

    Inflammation of the mouth surface causes ulcers. Various factors can cause this, such as vitamin deficiencies, medications, and autoimmunity (the body's immune system attacking itself). Often, no clear cause is found, and the ulcers heal on their own.

  • Viral mucositis

    A viral mucosal rash is a skin rash that occurs in association with viral infections, often serving as a diagnostic clue.

  • Candidiasis (oral, hands and feet)
  • Malignant lymphoma
  • Burn/scald of roof of mouth

  • Crohn's disease
  • Systemic lupus erythematosus (SLE)
  • Palmoplantar pustulosis

Related serious diseases

Sometimes, Mouth ulcer may be related to these serious diseases:

  • Acute HIV infection

    Acute HIV infection occurs in some people during the first 4 weeks after contracting the HIV virus. The virus rapidly attacks immune cells and causes fever, headache, and sometimes a rash. The patient is highly contagious during this time as the viral load is high. Risk factors for transmitting HIV include unprotected sexual activity and contaminated needle stick injuries (e.g., via tattoos or sharing needles). Rarely, it is transmitted through the transfusion of blood products.

Doctor's Diagnostic Questions

Your doctor may ask these questions to check for this symptom:

  • Do you have mouth sores or erosions?

  • Is your skin itchy?

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

  • Do you have a fever?

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Find Similar Symptoms

Similar symptoms or complaints

References

  • Akintoye SO, Greenberg MS. Recurrent aphthous stomatitis. Dent Clin North Am. 2014 Apr;58(2):281-97. doi: 10.1016/j.cden.2013.12.002. Epub 2014 Jan 21. PMID: 24655523; PMCID: PMC3964366.

Reviewed By:

Luri Lee, DMD

Luri Lee, DMD (Dentistry)

Dr. Luri Lee graduated from Boston University with a Bachelor of Arts in Psychology and Biology. She then continued her education at Boston University Henry M. Goldman School of Dental Medicine where she graduated Summa Cum Laude and was inducted into the Omicron Kappa Upsilon National Dental Honor Society. During her time in dental school, Dr. Lee was the recipient of the Spencer N. Frankl Scholarship for her strong academic performance and active participation in the school and community. Following dental school, Dr. Lee stayed at Boston University to complete a one year Advanced Education in General Dentistry residency program. In 2020 Dr. Lee was recognized among the “10 Under Ten” by the Massachusetts Dental Society for her contributions to the dental community and her volunteer work in Panama. Dr. Lee is licensed to practice in Massachusetts and is a member of the American Dental Association, Massachusetts Dental Society and Academy of General Dentistry.

Yoshinori Abe, MD

Yoshinori Abe, MD (Internal Medicine)

Dr. Abe graduated from The University of Tokyo School of Medicine in 2015. He completed his residency at the Tokyo Metropolitan Health and Longevity Medical Center. He co-founded Ubie, Inc. in May 2017, where he currently serves as CEO & product owner at Ubie. Since December 2019, he has been a member of the Special Committee for Activation of Research in Emergency AI of the Japanese Association for Acute Medicine. | | Dr. Abe has been elected in the 2020 Forbes 30 Under 30 Asia Healthcare & Science category.

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