The hardness of the incision after hernia surgery is commonly caused by the following reasons: first, local scar proliferation, when the incision in the healing process, there will be a lot of scar tissue to help wound healing, in the improvement of the local can be touched with a hard swelling, generally do not worry too much, with the prolongation of time, the swelling can be gradually become softer, if necessary, you can apply local scar cream, sticking scar paste to the treatment. Secondly, it may be caused by the rejection of suture, surgery in the process of suture need to use suture, a small number of patients will have rejection reaction to the suture, manifested as a hard localized lump, sometimes combined with mild pressure and pain and redness of the skin, and even ulceration, which can go to the hospital to find the attending physician to check. Third, the local infection caused by the hospital, which need to check the blood routine and abdominal ultrasound and so on to be clear.