After a patient is bitten by a bug, different treatment methods can be adopted according to the severity of the injury. If the damage of the bug bite is mild, only accompanied by local redness, swelling and pain, without causing obvious bleeding and activity restriction, the swelling and pain symptoms can be improved by applying topical flucytosine and Bactrim ointment and taking oral cefixime granules to promote the absorption of inflammation. Second, if the insect bite is accompanied by active bleeding, and the patient has obvious chills, high fever, local congestion, elevated skin temperature and other manifestations. At this time, you need to use cephalosporin III antibiotic anti-infection treatment, intravenous use of dexamethasone 10mg to control inflammation, the wound needs to be expanded clean treatment, hydrogen peroxide, vital iodine, saline alternately rinse, local vascular stitches to stop bleeding, trauma using Vaseline gauze drainage, strengthen the local change of treatment, about a week systemic symptoms of poisoning and local infection can be controlled more quickly.