After the mosquito bite left black scars, that is, black scars, most of the abnormal increase in melanin synthesis, resulting in epidermal pigmentation related, generally after the passage of time, black scars can be self-reduced or even disappear, no need to worry too much. But some cases black scars can not be eliminated by themselves, need to take medication, physical means to intervene: a. Medication: If the black scars after mosquito bites can not recover by themselves, then you can go to the hospital and follow the medical advice to use trimethoprim, betamethasone, fluorouracil and other drugs to reduce the hardness and thickness of the scar. Physical means: 1, ultrasonic therapy: Patients can go to the hospital for physical therapy, including the use of ultrasonic therapy to soften the scar, as well as audio electrical therapy to achieve the effect of anti-inflammatory and pain relief, and promote blood circulation; 2, wax therapy: is also a common way of scar treatment, for the deep tissue of the scar not only has a certain degree of swelling, but also to promote the function of local tissue metabolism, which is conducive to the elimination of black scars 3, cryotherapy: can dispose of the injury in extremely low temperature, so as to destroy the scar tissue and achieve the effect of removing black scars; 4, other treatments: including Q laser, picosecond laser, can also be used to remove black scars.