I had severe anal pain past 1 month and they diagnosed as perianal abscess through CT scan and had a surgery to incision and drainage the abscess.. it’s been 10 days and Iam feeling better slowly . Surgery wound kept open and I had some discharge occasionally. But pain is reduced a lot . Suddenly after 10 days of betterment , I had a pain and swelling near the surgery wound . Then after some hours there is white pus discharge from the wound site .. is this normal ? Or is it cause of something else to be worried .