What causes painful lump on top of butt crack?
Patient: At the top of my butt crack it feels as if there is a lump and it hurts a lot whenever any pressure is put on it, its hard to even sit down. It feels hard at first but you can press it, I choose not to cause it is very painful. I'm not sure where it came from or what it is so any help would be fantastic. Doctor: Hi, thanks for writing to HCM!    If I were your treating Doctor for this case of painful lump on top of butt crack, I would come up with three possibilities, these include: 1.     skin or hair follicle infection due to some friction injury or pilonidal sinus2.     The second possibility is of an ischiorectal abscess or some papilloma/neurofibroma getting infected     3.     The last possibility is of some infected dermoid cyst or benign tumor / tumor like condition      Overall, it is inflammatory or benign and not worry about this!I suggest you to see a surgeon for examination and few tests for confirmation and to determine the line of treatment!Hope this answers your question. If you have additional questions or follow up questions then please do not hesitate in writing to us. I will be happy to answer your questions. Wishing you good health.