See as per ur discription And no clinical examination It's seems to be a abcess in the perianal region which formed now a fistula So It's better u show to some good colorectal or genral surgeon Do one MR FISTULOGRAM IT WILL GIVE YOU THE DIAGNOSIS If u do the conservative Management it will again occur in 5- 6 month So it's better do a well diagnosis and treatment as per

One question is - is it perineal or perianal abscess? I am assuming u have been suffering from perianal abscess, because perineal and perianal are different. So you had perianal abscess, which u have undergone surgery, but you get pain and the surgery part swollens up now and then. It is most likely that you are suffering from fistula in ano. It's an abnormal connection between the skin and anywhere in the anorectum. Because of this connection, there is infection of the area and you get swollen. You have to take MRI Fistulogram to know exactly whether u have fistula or sinus and also the tract of the fistula fully.

Get examined by good Laser Surgeon general surgeon

Please get MRI done Manage accordingly

Any medicines goin on now? Any conplications in first surgery? Any fever now, pls consult.