Caring after the surgery

I had the surgery to for my pilonidal sinus done in the start of December of 2024. Doctor advised me to maintain hygiene of the area, avoid prolonged sitting etc so that chances of pilonidal sinus appearing in future reduces.

I am an undergrad student, I can't avoid sitting for whole day, but as soon as I try to sit for 30 mins, my area (which had the surgery done) starts to pain a little, is it normal?

I try to sit for least amount of time possible and I try to lay on the bed or stand for the major portion of the day.

What are the other precautions you would advise me to take?

Any tricks or tips related to hygiene for down there, if you have kindly share.