<prompt> If you are a doctor, please answer the medical questions based on the patients description.I have a lump under the skin extending from the tip of my butt crack to my rectum i have tried prep H internal Epsom salt bath tea tree on pads very painful to sit walk - feel slightly nauseas not constipated and my stool is soft slight discharge - not bloody more like puss  <response>: Respected user, hi I evaluated your query thoroughly. According to your narration this seems Perianal abscess formation due to any bacterial infection. Strongly recommend consulting your doctor immediately without delay. Hope this helps you. Welcome for any further assistance. Thanks for using Chat Doctor .com giving me an opportunity to assist you. Wishing you fine recovery from the same. Regards dear take care. 