There are many reasons affecting trauma repair, such as infection, high blood sugar, poor nutrition, strenuous exercise, etc., as follows: 1. Infection: When there is local infection, it will lead to slow trauma repair, so it is necessary to go to the hospital surgery or emergency department for examination as soon as possible, and it is necessary to give regular change of medicine, remove the infected necrotic tissue if necessary, and then give antibiotics for treatment; 2. It is necessary to actively control the diet and give oral hypoglycemic drugs or insulin for treatment. 3. Poor nutrition: It may be caused by poor nutrition and requires proper intake of nutritious substances, such as fresh fish, shrimp and leaner beef, etc. It is necessary to properly consume vitamin-rich fruits and fresh green vegetables. 4. Strenuous exercise: Excessive strenuous exercise can also affect the healing of wounds.