Hello, I Am 32 Years Old Male. On The May

Hello, I am 32 years old male. On the may 19th, i had fistulotomy operation done for the recidive anal fistula. The wound looks clear, as surgeon said on the control check-up, and i am fealing ok, no pains, no bleeding, regular stools. My only concern is the small amount of drainage (puss like) which appears on my gauze few hours (or less) after bovel movements. After wash-up there is no more drainage during the day. Is this behaviour normal?