After being bitten by the caddisfly, it can be treated by stopping itching, pain relief and antibacterial and anti-inflammatory methods. 1. Stop itching: the caddisfly bite will cause skin irritation, which will be clinically manifested as itching. Under doctor’s guidance, symptomatic anti-allergic drugs can be used to relieve itching symptoms, such as topical compound dexamethasone cream and butylhydroxy acid ointment and other anti-allergic drugs. 2. Pain relief: caddisflies will feel pain in the local skin after biting, when the symptoms are obvious, you can use cold compresses or lidocaine gel under the guidance of the doctor to relieve the pain symptoms. 3. Disinfection: After the caddisfly bites the skin, the patient’s skin may induce local infection, which may be manifested as local redness, swelling and heat pain. It needs to be disinfected with iodophor topically in time, then the inflammatory reaction can be reduced. After being bitten by caddisflies, patients should pay attention to the skin cleanliness of the affected area, avoid direct contact with the affected area with hands, and prohibit eating spicy and irritating food. If the symptoms of the wound continue to be unrelieved, it is recommended that the patient go to the regular hospital for examination in time, so that the professional doctor can make a diagnosis and treatment, and follow the doctor’s instructions to use the medication.