<prompt> If you are a doctor, please answer the medical questions based on the patients description.i have a very sore lump between my testicles and anus on the right side and it seams to keep getting bigger. at first it was small and i squeezed it and white stuff came out , it seamed to go away for a while now its back and bigger and nothing comes out . what could this be?  <response>: Welcome to Chat Doctor .1. Your history suggest me that its an infective collection. Could be hair follicular infection carbuncle fur uncle Followed by Colonial cyst as next possible cause.2.Its not advised to squeegee compress the lesion lump as it can complicate further.3. At this stage I would recumbent to see your GP and let it get examined and a course of antibiotic might be helpful.4. Bear in mind there are complicates like colonial sinuses, fistulous communication with recur and so on - so deal it careful and get rid of it.5. Maintain local hygiene, wash the area with antiseptic liquid, do not disturb the lesion - that will help in fast healing. Good luck. Hope it helps you. Wish you a good health. Anything to ask ? Do not hesitate. Thank you. 