Keloid scars, also known as connective tissue hyperplasia, usually occur on the forehead, shoulders, neck, ears, and extremities. Red keloid scars on the chest are usually caused by acne. It may also occur secondary to skin trauma, or spontaneous formation and overgrowth of pathologic scar tissue. Systemic and localized conditions are caused by different reasons: Common causes 1. Systemic: There is a certain degree of heredity, which may be related to autosomal dominant genes. It is also related to specific qualities of the body. Some patients are keloidal and can form keloids from minor injuries on the body surface. In addition, keloid scars are usually concentrated in adolescence, which may be related to high sex hormone levels during puberty. 2. Local onset: commonly seen after medically invasive consultations such as tattoos, and can also be caused by mosquito bites after scratching the skin on the chest, as well as foreign bodies in chest wounds, inflammation, and localized strains that may promote the formation of keloid scars. Treatment method 1, small keloid: generally conservative treatment, such as oral medication or topical medication is used. Oral medications such as trenbolone and benadryl are commonly used. Topical medications include tretinoin cream, retinoic acid ointment, etc.; 2. Medium-sized and large keloids: a comprehensive treatment plan based on surgical treatment is usually used, with staged excision sutures and intra-scar excision sutures commonly used for severe hyperplastic keloids. Intra-scar excision can reduce the recurrence rate by not stimulating the collagen tissue synthesis of the incision, and even if recurrence occurs, it will not exceed the original scar damage, and flap grafting or skin soft tissue expansion can also be chosen. 3. Super large tumor-type keloid: Under the condition of meeting the indications for surgery, a comprehensive treatment plan of surgical excision and supplemented with skin slice and flap repair is usually performed. Non-surgical treatment can also be considered for inflammatory keloids when there is no obvious scar proliferation, but when congestion is evident and soft tissue is the main feature, including treatment with drug injections, de-redging laser, silicone preparations and topical medications, and then surgical treatment is considered when it is not effective. The disease is recurrent and grows on the surface of the skin, which affects the aesthetics of the skin and easily causes psychological damage to the patient. Patients are advised to understand the disease correctly, follow medical advice and avoid scratching. You can wear loose clothing and avoid rubbing the affected area many times.