17 years old, do I need a guardian's signature for the operation? It depends on what operation you have. For life-threatening surgery, it must be signed by a guardian or relative.

You want a foreskin operation. You don't need a guardian's signature. The foreskin operation is a minor operation. You can go by yourself, but you should rest at home after the operation. You still need someone to take care of you, so you'd better talk to your father. He will accompany you to the operation.

I am often embarrassed to tell my family. It's actually quite simple. Just tell your parents that the school has a physical examination. The school doctor says you need to be circumcised. Parents will take you to see a doctor when they know. If you really need surgery, your parents will not interfere and will accompany you in the surgery. They will take good care of you after the operation. The parents attach great importance to their children's illness.