Keloid, simply put, is a body type that is prone to scarring. In fact, scar is a product of wound repair after various traumas to the human body, which is a normal physiological phenomenon. Keloid means that it is more likely to form scar than normal people. Generally, normal people have shallow skin damage and scar is not obvious, but keloid will form obvious scar, so it is recommended to check it in regular hospital. If diagnosed, once the scar is formed, topical medication is basically ineffective. For hyperplastic scar, you can choose intra-dermal drug injection, which can improve gradually. For atrophic scars, fractional laser treatment and skin grinding can be chosen, which can improve gradually. The key is to pay attention to skin trauma and avoid skin infection. For larger scar, surgical treatment and skin expander can be chosen.