Ant bites on the 2nd day is still swollen may be the manifestation of skin allergies, to go to the hospital as soon as possible to check, the more serious patients should be injected under the guidance of a professional physician antihistamines, such as cetirizine, can effectively reduce the allergic reaction; such as the combination of inflammation and infection, the need for joint antibiotic treatment, such as cephalosporin, penicillin, etc.. Injection of selective histamine H1 receptor antagonist preparations such as cetirizine and famotidine after the 2nd day of ant bite can alleviate the allergic symptoms; at the same time, combined with antibiotics such as cefuroxime and penicillin, etc., to reduce the risk of wound infection in order to facilitate wound healing. Ant bites still swollen on the 2nd day should promptly consult a doctor and choose the best treatment according to the root condition, and also treat the wound before seeking medical attention to avoid secondary infection.