<s>[INST] I have a bump on my buttocks just a single bump that has been there for a month now it s getting smaller so I finally thought it was going away but it hasn t and still itches just the same no pain and no other bumps I tried neosporin and lamasil but nothing is working! [/INST] Hi, an itchy lesion indicates that there is some kind of infection possibly fungus and a receding nodule indicates that the infection is controlled!Well, therefore, If I were your treating Doctor for this case of a buttock lump, I would come up with only one and one possibility that is a sebaceous cyst or a dermatofibroma-like condition getting infected again and again! Nothing to worry about this and try not to get infected there! In fact surgical excision only treats this...Therefore, consult some  surgeon if this worries you that much and I would suggest you to go for an FNAC test of the lump for confirmation and to relieve your concerns!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. </s>