Keloid scarring may be caused by heredity, infection or trauma. 1. Heredity: Heredity is the most common cause of keloid scarring. For example, if there are multiple keloid scarring patients in the family, the children may also be keloid scarred due to genetic factors. 2. Infection: when the skin is damaged and the local disinfection is not done properly during the treatment, resulting in recurrent wound infection, it will affect the healing time and lead to localized scar formation. 3. Trauma: Trauma causes damage to the skin, and scarring may form on the skin after the wound recovers. Scarring has a serious impact on the health of the skin, in normal daily life, scarring must be vigilant, actively do a good job of prevention, away from the causative factors, once the formation of scarring, should go to the hospital in a timely manner, under the guidance of the doctor to standardize the treatment, to reduce the harm caused by the disease on the body.