<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have a painful lump on my buttocks that seems to be getting bigger. I think it might be a pilonidal cyst.  <response>: Yes, it is possible that you have a pilonidal cyst. To diagnose and treat this, you will need wound care management, a complete physical skin exam performed ML, incision and drainage ID, and possibly an excision removal of the cyst. We will also need to perform a rectal examination and culture your wound to check for infection. Depending on the severity of your cyst, other therapeutic procedures on your skin and breast may also be necessary. 