Swollen arm bites can be mosquito bites, bee stings, or animal bites. It is recommended to do a good job of local care, if necessary, give antihistamine, glucocorticosteroids, can be given through the intravenous way of treatment. 1. Mosquito bites: swollen arm bites are mostly seen in mosquito bites, which may appear localized redness, swelling and so on. It is recommended to avoid scratching and stimulation induced infection, resulting in aggravation of the condition. Can be cleaned with water, external tretinoin cream, hydrocortisone cream coated, can quickly relieve the inflammatory reaction. If necessary, oral loratadine, levocetirizine hydrochloride and other drugs, with anti-allergic, anti-itch effect. 2. Bee stings: Redness and swelling caused by bee stings on the arm, you need to pull out the stinger of the bee, and then use soapy water, sodium bicarbonate solution to rinse the wound to neutralize the toxins, and apply iodine to disinfect. Localized redness, swelling and pain are serious, you can use ibuprofen for pain relief. If the injury is more serious, you can go to a regular hospital for emergency treatment. 3. Bitten by other animals: If you are bitten by other animals, such as dogs, you need to ask a doctor to treat the affected area and get a rabies vaccination. To summarize, bite wounds include a wide range, you need to first understand what is bitten, but also to understand the extent of the bite. If the symptoms are obvious, it is recommended to go to the hospital in time to avoid delayed treatment.