In life, if the insect bite wound is black, this is because the insect secretions into the wound caused by infection and inflammation or allergies will appear black. If a serious insect bite leads to skin tissue necrosis, it will also appear black phenomenon. In the treatment of insect bites should pay attention to timely disinfection, anti-infection treatment, to anti-inflammatory treatment. After being bitten by the insects appear local skin blackening should pay attention to clean up the necrotic skin, and then for the inside of the injured skin cleaning, disinfection so that it can heal quickly. At the same time, cleaning off the blackened skin can be better disinfection of the injured skin inside to avoid shading. If a bug bite appears black and feel abnormal, you need to go to the hospital in time to prevent some bugs are toxic to avoid circulation through the blood to the whole body. After being bitten by a bug, you need to clean and then disinfect, it is best to go to the hospital for examination, especially the need to clean off the blackened skin to avoid affecting the recovery.