Redness and swelling after being bitten by flying ants, you can choose topical drugs, oral drugs and other ways. 1. Topical medication: glycerite lotion can be used externally, if the redness and swelling is heavy, glucocorticoid cream can be used externally, according to the site and the severity of the selection of the appropriate strength, commonly used, such as halomethasone, etc.; if the affected areas of the combination of infections can be used with antibiotic ointment, such as mupirocin ointment and so on. 2. Oral medication: If the itching is intense, oral antihistamine medication can be taken, such as loratadine, olopatadine and so on. If the ants bite, the redness and swelling is serious or accompanied by systemic symptoms, you should go to the regular hospital in time to avoid delaying the condition.