Moles on the Skin and Lining of the Mouth
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Reviewed By:
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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Content updated on Jan 4, 2023
About the symptom
Moles appear as small, dark brown spots that can be found in any part of the skin or lining of the mouth.
When to see a doctor
Seek professional care if you experience any of the following symptoms
Moles on the skin and lining of the mouth
Possible causes
- Nevus (sebaceous nevus, pigmented cell nevus, nevus of Ota, epidermal nevus)
Also known as moles, these are clumps of pigmented (colored) cells. The condition is often present at birth, and is nearly always harmless.
- Subungual bleeding
This is a purplish discoloration of the nails as a result from bleeding under the nail. This is caused by direct trauma.
- Pityriasis versicolor
This is a common fungal infection that causes discolored patches, often on the chest, back, arms and neck. It is due to an overgrowth of a type of fungus that is found normally on skin. It most frequently affects young adults and teens, and in hot and humid climates.
- Malassezia infection
- Genital rashes
- Lichen simplex chronicus
- Purpura pigmentosa
- Pityriasis rubra pilaris
Chloasma
- Hyperthyroidism
Questions your doctor may ask about this symptom
Your doctor may ask these questions to check for this symptom
Are there black, blue, or brown spots on the skin or elsewhere? (Including moles)
Other Related Symptoms
Similar symptoms or complaints
Symptoms from the same body system / part
Symptoms treated by the same specialty
Reviewed By:
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.
Just 3 minutes.
Developed by doctors.
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Seiji Kanazawa, MD, PHD
Obstetrics and gynecology (OBGYN)
National Center for Child Health and Development, Japan