If the suture used for prepuce surgery is absorbable, it can be divided into medical catgut suture and synthetic absorbable sutures. The absorption of catgut is generally about 15 days, and the synthetic absorbable line is generally about 1 month. It can be absorbed for 3-6 months according to different manufacturers and different quality. If there is no absorption, no redness and swelling reaction, no special treatment is needed.