Hi. Thanks for your query. Noted the history and understood your concerns. The lump under the skin that can be felt at the spot you have explained looks to be due to a boil or an infected cyst. Rare possibility of a Fistula-in-ano should be born in mind. I would advise you the following in such a situation: Consult a General Surgeon for a proper examination, per-rectal examination to know the proper diagnosis. Get started on an antibiotic, anti-inflammatory medication and see the results. Take rest as it is on pressure point. Get operated if advised so by your Surgeon.