The main symptom of prepuce is that the opening of foreskin is narrow and pinhole-like, which can cause different degrees of difficulty in urination, slow and tiny urine flow, and foreskin puffing up when urinating. The foreskin cannot be turned up for cleaning, and the prepuce accumulates in the foreskin sac, which can be discharged from the foreskin opening and can be stored in small pieces in the coronal groove of the penis head. The foreskin scale remains, the urine is not discharged smoothly, easy to occur foreskin penis head inflammation. When the foreskin penis head inflammation, the foreskin mouth is red and swollen, there is purulent discharge. Embedded prepuce pain is intense, foreskin edema, narrow ring can be seen at its upper edge, the head of the penis is dark purple, there are difficulties in urination, long time embedded can occur foreskin and glans necrosis.