Black marks left behind by mosquito bites can be eliminated through the use of medications such as hydroquinone cream and vitamin E milk, as well as the use of physical treatments such as lasers. Patients who are left with black marks after being bitten by mosquitoes are advised to go to the hospital, according to the specific condition of the patient, under the guidance of the doctor for formal treatment. 1. Medication: Patients with black marks after being bitten by mosquitoes can use hydroquinone cream and other topical decolorizers, vitamin E cream and other antioxidant creams under the guidance of a doctor. All of the above drugs should be used under the guidance of a doctor, and patients should not use them on their own to avoid delaying the condition. 2. Physical therapy: patients can choose picosecond laser treatment. By crushing the local melanin to remove the role of black marks left after mosquito bites. Patients need to pay attention to do a good job of anti-mosquito, mosquito measures, usually as little as possible to go to the mosquito places, so as to avoid mosquito bites.