The redness and swelling of an ant bite is due to the allergic and inflammatory reaction that occurs at the site of the bite caused by the ant’s secretions. After being bitten by ants, ants will inject their own formic acid and some pancreatic protein substances into the body along the bite site, causing the body to have an allergic reaction to these substances, resulting in the exudation of local inflammatory factors. Under the action of the inflammatory factor, the peripheral microcirculation of the skin lesion can be changed, and then the redness, swelling, itching and other symptoms of the wound. Ant bites appear red and swollen manifestations recommend timely medical treatment, follow the doctor’s instructions to use medication.