According to "Regulations on Handling Medical Accidents", the minimum medical accident is Grade 4, and it must also cause obvious personal injury consequences. "My parents didn't know I had an operation at all" means that the injury was not obvious and did not cause substantial damage to your body, so it didn't constitute a medical accident.

There are many controversies about the unsatisfactory cosmetic effect. People's aesthetic standards are different. Unless they are disfigured, it is generally difficult to determine which one is better before and after the operation. It is also difficult to prove that the doctor miscalculated during the operation.