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1 red bump on buttock

Hi Doctor,
About 2-3 months ago I noticed a small, perfectly round, flat yet raised, bump on my buttock close to where the thigh meets the buttock. The bump is not painful and does not seem to be fluid filled. It has not gone away but it has not gotten any bigger either. I am wondering what this is... and if I should be concerned.. I have never had unprotected sex, always used condoms. I noticed it appears about 1 week after I started wearing spandex capris to the gym. I have since stopped wearing them but it has not gone away. I will attach a few pictures I took, unfortunately they are not great quality.
I am a 21 year old female, otherwise healthy.


Thank you...
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1 Answers
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563773 tn?1374250139
Thanks for posting your query.

I can understand your concern for the bump on the buttocks which has been present for 2-3 months.

Given your sexual history of not having any unprotected sex and the bump being a single one without any pain or itching, chances of skin conditions like boil or herpes sores are very less. Both of these conditions are painful and moreover herpes sores present in clusters rather than any single lump.

Two possibilities need to be ruled out in your case. First possibility is of hidradenitis suppurativa. It is caused by inflamed apocrine sweat glands and plugging of the hair follicles due to obesity or tight non breathabale clothing. But this condition is also painful to start with. If you did not have any pain when this lump appearade then also chances of this possibility are less.

Other than that, it can be a small cyst or a lump appearing due to friction of the skin with skin or clothes. A sebaceous cyst is a closed sac occurring just under the skin which contains a "pasty" or "cheesy" looking substance called keratin.They may occur anywhere on body and even buttocks can be effected. Generally no treatment is required but sometimes may get infected or some people may get them removed for cosmetic reasons.

Given your age, chances of any benign growths of buttocks are less. Hence from the symptoms and photographs, possibility of this lump being due to repetitive friction or being a cyst are more. You need to get it examined from a dermatologist to confirm the diagnosis as physical examination and biopsy are needed to confirm the diagnosis.

Hope that this information helps and hope that you get better soon.

Wishing you good health.
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