The scar that can be picked off is actually the scab of the wound, the scar is picked off to reveal the red flesh first of all to keep the local clean and dry, to avoid wound infection. If a small amount of bleeding occurs, can be sterilized with povidone-iodine, after the wound is dry, use erythromycin ointment, mupirocin ointment and other drugs to fight infection and promote wound recovery. If a large area of scab is picked off, it is easy to cause bleeding and infection, and patients are advised to go to the hospital for sterile treatment. Wound healing is a series of repair activities carried out by the human body through its own regenerative capacity to restore surface continuity and integrity and maintain the stability of the internal environment. When localized breakage and bleeding, if it does not injure large blood vessels, it can usually stop bleeding by itself. Due to the hemostasis and repair carried out by platelets and fibrin, dark-colored lumpy hard knots, called scabs, are often formed on the wound surface, which can protect the wound from infection and gradually fall off as the wound heals. As the wound gradually coagulates and white blood cells fight infection while new granulation tissue is generated, it may be accompanied by localized itchiness, and the patient’s constant scratching causes the scab to fall off, revealing a reddish wound. During the wound healing period, patients should avoid spicy, stimulating, greasy, easily allergenic diet, such as hot pot, fried chicken, shrimp, sea crabs, mango, lychee, etc., and pay attention to avoid smoking, drinking, staying up all night and other bad habits of life and diet. You can consume more fresh fruits and vegetables, such as apples, oranges, winter melon, spinach, bitter melon, tomatoes, as well as pig’s trotters, kelp, milk, lean meat, etc., to supplement protein, trace elements and vitamins, in order to promote wound healing.