<s>[INST] HI. I have a pyramidal cyst in the tailbone. I had one exactly one year ago and it was the most painful thing I have ever experienced. I now have one again, and would like to know how I get these things, and how I can get rid of them fast. Last year, I sat on a heating pad all the time, and a hole was eventually made in my tailbone and a  puss-like substance seeped out of the hole, and the pain immediately went away. [/INST] Hi, dairy have gone through your question. I can understand your concern. You may have some inflammatory cyst or abscess formation.  You should go for fine needle aspiration cytology or biopsy.  It will give you exact diagnosis. Then you should take treatment accordingly. Hope I have answered your question, if you have doubt then I will be happy to answer. Thanks for using Chat Doctor. Wish you a very good health. </s>