Scar tissue left after mosquito bites can be improved in appearance by medication and surgery, and cannot be completely removed, the specific treatment effect varies from person to person. 1. Commonly used medications include steroid preparations such as Triamcinolone acetonide injection, which is mainly injected into the scar tissue to inhibit the proliferation of collagen in order to achieve the therapeutic effect of degradation of the scar. Side effects include localized skin atrophy, capillary dilatation and Cushing’s syndrome. 2. Surgical treatments include keloidectomy followed by reduction and fine suturing and skin resurfacing, etc. Reduction and fine suturing is suitable for scar tissues that are not large in size. It is usually performed in a delicate way to reduce the tension of the incision, thus reducing secondary injury and further minimizing the degree of postoperative scarring. Scarring after mosquito bites is rare, mostly due to inappropriate scratching of the itchy area, leading to local soft tissue infection and scarring after healing; there is also a rare case of keloid scarring. The treatment of scar tissue left behind after mosquito bites should be carried out in regular hospitals, following the doctor’s instructions to use medication, and should not be treated without authorization, so as not to cause adverse consequences.