Mosquito bites and scratches leave scars, need to do a good job of daily care, reduce hyperpigmentation; you can also consider local medication, phototherapy and other ways to improve the appearance of scarring. 1. Daily care: leg skin after mosquito bites left healing wound, the new skin is reddish, at this time you need to pay attention to keep the local clean and dry, to prevent secondary infections, to avoid often scratching and mechanical damage caused by hand; at the same time to pay attention to strict sunscreen to avoid the legacy of heavier hyperpigmentation. 2. Local medication: for local newborn hyperplastic scar, you can directly use drugs to inhibit scar proliferation, such as silicone gel, polysulfonic acid mucopolysaccharide cream, sodium heparin urea cystin gel, etc., to improve the appearance of the scar. 3. Photoelectric treatment: For localized scarring and, it can also be improved by fractional laser, dye laser and other photoelectric treatments. All of the above medications should be used in accordance with medical advice. It is recommended that patients who wish to be treated should go to regular medical institutions for consultation and standardized treatment under the guidance of doctors.