Hello and welcome to HCM
As you have said you have yellow discharge, this might be due to infection or unhygienic condition.
Wants to know some history like how you get the wound? have you taken any antibiotic course? Does aseptic dressing done or not? what hygiene care are you taking?
Consult your doctor and go for aseptic dressing and take a course a antibiotic to get rid from this problem. Also don't touch any non sterile material to the wound and clean it with Dettol
Hope this will help you.