Hi and Thanks for Asking Questions
Firstly don't be scared from your parents, tell them about your problem and they will really help you in getting cure.
may reoccur even after surgery because its main cause is sitting on a chair that's why it is also called a Jeep-mans Disease. But as you are describing only pus is coming then it might be local infection which can be cured by taking a course of Antibiotics.
So don't be scared and tell your problem to your Lovely parents and than to doctor as soon as possible and get well soon. Hoping you will follow my advise.