Black marks are often caused by melanin pigmentation; scars, i.e. keloid scars, are often caused by fibrous tissue proliferation, and both can be removed with the help of medication and medical aesthetic treatments. 1. Pigmentation: Skin trauma, inflammatory skin diseases, internal diseases and other factors may cause localized melanin pigmentation, which leads to black marks. Medication: For patients with lighter black marks and relatively mild symptoms, local application of compound arbutin cream, cumquat cream ointment, hydroquinone cream and other ointments can help to lighten the local black marks; for adrenal-related diseases, liver diseases resulting in black marks, it is also necessary to take prednisone, reduced glutathione and other medications for the treatment of the original pathogenesis. Aesthetic treatment: For patients with more obvious black marks and greater impact on their appearance, laser treatment, chemical peeling, photorejuvenation and other methods can be used to help remove black marks. 2. Scarring: When there is improper treatment and care after the skin has been injured by trauma or inflammation, it may stimulate the proliferation of skin fibrous tissues, which may lead to scarring. Medication: If the scar formation time is short, you can apply topical mucopolysaccharide polysulfate cream, silicone gel and other drugs; if the scar formation time is long, you can inject topical steroids such as triamcinolone acetonide to soften the scar. Aesthetic treatment: For patients with more serious scars that have a greater impact on their appearance, laser treatment is also needed to help lighten and remove the scars. It should be noted that the above treatments should be carried out in regular medical institutions under the guidance of specialists to avoid the occurrence of adverse reactions.