The black marks after the removal of flat warts are mostly pigmentation left after local skin damage, part of the color deposition can subside on its own, if it does not subside for a long time, it can be dealt with by medication (cumulonimbus cream ointment, etc.), physical therapy and other methods. 1. life management: flat warts in the removal, due to inflammation stimulation, will lead to hyperpigmentation, usually 3 to 6 months or so will gradually subside. During this period, you need to pay attention to do a good job of sunscreen, reduce the stimulation of ultraviolet rays on the black mark area. 2. Medication: If the black marks are darker, you can apply mucopolysaccharides polysulfate cream, asiaticoside cream ointment, hydroquinone cream ointment, vitamin E cream and other medications to the black marks to improve them. 3. Physical therapy: If the black marks do not subside for a long time, you should also consider other methods of treatment, for example, by using laser energy, the melanin will be broken and discharged from the body. It is recommended that patients who wish to be treated go to a regular medical institution in a timely manner, strictly comply with the doctor’s instructions, and avoid the blind use of drugs, so as not to cause adverse consequences.