Mouth Ulcer
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Try one of these related symptoms.
Ulcer in the mouth
Fever blisters
Canker sores
Oral ulcer
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.
- Mucous Membrane Pemphigoid
An autoimmune skin disease (caused by the body's immune system attacking its own cells).
- Candidiasis (Oral, Hands and Feet)
Herpes labialis
- Burn/Scald of Roof of Mouth
- Crohn's Disease
- Malignant Lymphoma
- Systemic Lupus Erythematosus (SLE)
- Palmoplantar Pustulosis
Doctor's Diagnostic Questions
Your doctor may ask these questions to check for this symptom:
- Do you have any mouth ulcers?
- When did you first notice the mouth ulcers?
- How often do you experience mouth ulcers?
- How are your mouth ulcers now?
- Do you have painless redness or ulcers in your mouth?
Reviewed By:
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 (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.
Content updated on Feb 6, 2025
Following the Medical Content Editorial Policy
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Link to full study:
https://www.medrxiv.org/content/10.1101/2024.08.29.24312810v1References
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.