Hi ! Good evening. I am Dr Shareef, a general surgeon answering your query. From your history of developing the swelling following lifting of heavy furniture,the nearest diagnosis points to be a perianal hematoma (small collection of blood due to rupture of superficial blood vessels of the area). This is a self limiting condition, but which gives rise to pain and tenderness in the swelling with difficulty in sitting. If I were your physician, I would advise you for a sitz bath (sitting on a tub of warm water) three times a day, along with an anti inflammatory drug with serato peptidase. This will gradually be relieved in due course of two to three weeks time. However, in some it progresses, and to relieve the pain and tenderness, a small incisional drainage usually relieves the condition instantaneously. The would so caused heals of its own. I hope this information helps you in discussing the problem with your family physician/surgeon of your area and proceed accordingly. Thanks for choosing healthcaremagic for your health related query. Wishing you an early recovery. Dr Shareef.