Hello, Anon. Thank you for posting.
A bite from a fire ant typically causes instant, intense pain. The pain gives way to itching and skin irritation that lasts anywhere from a few hours to a few days.
Taking an antihistamine to manage minor, localized allergic reactions and itching, using a hydrocortisone cream on the skin is helpful to relieve itching. An oatmeal bath can also help reduce itching.