<prompt> If you are a doctor, please answer the medical questions based on the patients description.I had a small hard lump on my buttock like a mosquito bote which developed a white head. This thing went massive and the area all around was all red and inflamed.i was very ill and had a fever.a lot of Brown and yellow liquidy pus came out and with some coaxing so did a long tube of rubbery white pus. This happened again in the same area on a later date.recently one apea red on my arm and them a small one on my neck. What is causing this and what should i do?  <response>: Welcome to Chat Doctor. 1. The history and symptoms suggest the most possible cause is hair follicular infection inflammation in the first place.2. The next possible cause could be abscessed with collection of the infective material pus with in.3. In both cases I would recommend you not to interfere the lump by scratching, pressing as in that way you will increase the infection and complicate the condition.4. At this point I maintain local hygiene, clean the area with antiseptic liquid - soft and gentle. And need a course of antibiotic therapy that will heal the infective process. 5. If the lumps are big and complicated stage, it may need a small incision and Chat Doctor. 