After circumcision, there will be scar tissue formation at the penile suture area during the healing process, so it will feel slightly hard when touching. After the surgical suture, the early incision is in the acute inflammatory phase, there is a small amount of local tissue fluid exudation and inflammatory cell aggregation, redness, swelling and heat pain at the incision. The incision is red, swollen, hot and painful. In about 3~5 days, a large number of fibroblasts and capillaries proliferate and gradually form granulation tissue, which covers the incision and protects the wound against infection. From 5 to 6 days, fibroblasts start to produce collagen fibers, and then more and more collagen fibers proliferate in the following 7 days, and scar tissue starts to form gradually, completing the last part of the incision healing, and as the incision recovers, the scar tissue gradually becomes hard and firm, so it will feel hard when touching the suture area. If there are other uncomfortable symptoms at the incision, it is recommended to go to the hospital in time, to clarify the cause of the disease and then carry out targeted treatment.