What should I do if a mosquito bite turns black?

When the skin turns dark after a mosquito bite, it is usually due to post-inflammatory hyperpigmentation caused by the bite. The following methods can be used to address this condition: 1. General treatment: If the dark mark is not obvious and covers a small area, special treatment is generally unnecessary. Over time, the skin's natural metabolism will gradually cause the mark to fade away. 2. Medication treatment: For dark marks that are more noticeable and cover larger areas, topical medications such as hydroquinone cream, arbutin cream, or combination products containing hyaluronic acid and sodium heparin may be used under a doctor's guidance to help lighten the pigmentation. 3. Physical therapy: If the dark pigmentation persists for a long time, physical treatments such as laser therapy or infrared therapy can be considered. These treatments can effectively accelerate pigment metabolism and restore the skin to its normal color. 4. Precautions: Avoid prolonged sun exposure, and consume more foods rich in vitamin C, such as kiwi fruit and tomatoes, which can aid in skin lightening and recovery. If the dark mark persists or is accompanied by other symptoms, prompt medical consultation is recommended.