Depending on the severity of the flea bite, the patient may show different symptoms and different treatment methods should be taken. 1. If the flea bite is superficial in scope, accompanied only by local skin itching and pain, without causing widespread redness and swelling, the patient can be disinfected locally by applying topical Ruyi Jinhuang cream and vigorous iodine gauze. If the bite is extensive and causes significant local swelling, elevated skin temperature, severe pain, and widespread redness and swelling, oral loratadine anti-allergy treatment, intravenous cephalosporin antibiotics to strengthen the anti-infection, and local topical rubbing of Bactrim ointment, 75% alcohol Gauze is continuously applied externally. After active anti-infection, patients can generally subside the above symptoms in 5-7 days.