Hi, If I were your treating Doctor for this case of buttock lump, I would come up with three possibilities, these include: 1. benign and simple conditions like lipoma or neurofibroma or dermatofibroma; there is nothing to worry about these! 2. some sebaceous cyst or some other cysts like bursa or even parasitic cyst 3. resolved infection, chronic folliculitis or some benign stromal nodule! I suggest you to go for clinical assessment along with an FNAC and ultrasound of the lumps 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.