Hi! Good evening. I am Dr Shareef answering your query. From the history of yours, it seems to be an inflammatory swelling and most likely it could be a perianal abscess which might have drained of its own without your knowledge while jumping around or it might have been subsided by intake of antibiotics/anti inflammatory drugs of which there was no mention. However, the diagnosis and further management would depend on a physical examination of the lesion by a general surgeon of your area, and so I would advise you to take an appointment with him for a proper diagnosis and appropriate treatment. Till then you could go for some anti inflammatory drug along with a proton pump inhibitor in case of pain. I hope this information would help you in discussing with your family physician/treating doctor in further management of your problem. Please do not hesitate to ask in case of any further doubts. Thanks for choosing health care magic to clear doubts on your health problems. I wish you an early recovery. Dr Shareef.