Circumcision requires a physical examination, and generally requires a complete physical examination and preoperative related examinations in the outpatient clinic. 1. Physical examination: the main examination of the penis, check the development of the penis and foreskin, assess whether there are indications for surgery. 2. Pre-operative examination: blood test, blood coagulation, and screening for hepatitis B, syphilis, AIDS, gonorrhea, etc. Some patients need to complete chest X-ray and electrocardiogram to assess the relevant pre-operative risks. In summary, circumcision should go to a regular hospital for treatment, is a routine minor surgery, after surgery, change the medication on time, clothes choose loose and comfortable, while avoiding unfavorable sexual stimulation, so as not to cause penile erection caused by edema and other complications.