Scars, or keloid scars, can be categorized into hyperplastic scars, depressed keloid scars, keloid scars, and keloid cancers. It is impossible to remove keloid scars once they appear, but some measures can be taken to improve their appearance. Common methods include medication, hyaluronic acid filler and fractional laser treatment, etc. Surgery can also be performed if necessary. 1. Hyperplastic scar: early can be used silicone gel to inhibit scar proliferation of drugs, can also be combined with fractional laser, dye laser and other photoelectric treatment by stimulating collagen regeneration and rearrangement, occlusion of the scar at the capillary way to inhibit scar; has entered the stabilization period of hyperplastic scar can also be injected through the scar of drugs, surgical and other ways to improve the appearance. 2. Sunken scar: It is mostly seen in the case of heavy skin tissue damage, which will leave a sunken scar after healing. The appearance can be improved by plasma treatment, fractional laser and other photoelectric treatment, also can be used hyaluronic acid, autologous fat to fill the local depression to improve the appearance of keloid scars. 3. Keloid scar: It is mostly seen in earlobes, forehead, back of shoulder and other special parts or the parts with serious infection after wound healing, the keloid scar tissue erodes the surrounding normal skin tissue and grows expansively, and it can be injected with glucocorticoid drugs to soften the keloid scar, and it can be surgically excised and combined with postoperative radiation therapy. 4. Keloid carcinoma: although rare, it is serious, and the scar is often accompanied by redness, swelling, ulceration, abnormal exudation, etc. Keloid carcinoma is treated according to the standardized treatment of skin malignant tumors. It is recommended that patients should go to regular hospitals in time once the above situations occur. Specifically, it is recommended to consult the relevant departments of specialized hospitals, and specialists will adopt corresponding treatment plans according to the actual situation of individuals.