Most of the hardness around the slow recovery of the wound is normal, a small portion may be due to underlying diseases, wound infection and other special circumstances. 1. Normal situation: trauma patients if the wound debridement treatment after injury, the recovery time is mostly related to the wound site, the abdomen is generally 7 days, limb area is generally 14 days. Hardness around the wound, generally due to scarring repair caused by local connective tissue proliferation, instead of the original elasticity of the skin tissue, is a normal phenomenon. 2. Special circumstances: if the patient himself has underlying diseases, wound recovery is slower than normal, such as diabetes, hypoproteinemia, etc.. In addition, if there is no debridement after the injury or the wound is heavily contaminated, the wound may not heal, as well as the wound around the redness, swelling, tension, hardness, oozing and other manifestations of wound infection. There may also be other reasons for the hardness around the slow recovery of the wound, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment under the guidance of the doctor.