The genital foreskin is swollen, and it is important to consider whether the foreskin is embedded, whether it is an allergic reaction, and whether it is inflammation of the foreskin and glans. Foreskin impaction is obviously found to be swollen with edema; while allergic reaction, the foreskin is uniformly red, swollen, and the foreskin has edema; glansitis is mainly the inner plate of the foreskin, and the swelling is more obvious. It is recommended to visit the urology department of the hospital, and the doctor can make a preliminary judgment through physical examination. After the foreskin embedded must immediately perform embedded foreskin reset, through reset after the hot compress, 2-3 days can be completely restored to normal, restore normal, it is recommended that you can perform circumcision. In this case, many people just have a small foreskin mouth. Foreskin glansitis, can be avoided by paying attention to hygiene. Allergic foreskin edema, may come into contact with certain allergenic substances.