If a patient is bitten by an unknown insect and then becomes red, swollen and painful locally, it is recommended that the patient must be promptly cited for symptomatic treatment. For example, you can spray local flower lotion to improve the swelling and itching. Then you must avoid scratching with your hands, which can effectively avoid local skin rupture leading to infection. If necessary, you can apply local hormonal drugs, such as compound betamethasone ointment or compound dexamethasone ointment. Both can effectively play an analgesic and anti-inflammatory role, which can speed up the recovery of symptoms. However, patients must be observed in detail, once the local swelling gradually aggravated or even appear patients chills and fever, then must go to the hospital for consultation. Do a detailed examination to avoid the phenomenon of poisoning due to the excessive toxicity of the worm, which requires active treatment to avoid endangering the life of the patient.