Swollen feet from ant bites are a type of insect bite dermatitis, which is an allergic reaction of the body to ant body fluids, causing local or generalized symptoms in the body. It can be treated with antihistamines, such as paracetamol, cetirizine, loratadine, etc. Prednisone can also be used, and the dosage needs to be gradually reduced after it has been used. Combined infections can be treated with antimicrobial agents, and topical medications can be used such as glyburide lotion or topical anti-itch cream. Infectious dermatitis, also known as papular urticaria, is mainly associated with arthropod bites and is generally seen in spring, summer and autumn. Pay attention to personal hygiene, change clothes regularly, and eliminate bedbugs, fleas or ants in the surrounding area in a timely manner. As soon as there are pre-symptoms or wind-blossom-like damage should be treated promptly, which can reduce the attack, do not drink alcohol, do not eat spicy and stimulating food, and go to the countryside or parks less often during the onset.