When the ant stings, it injects a venom that causes the release of histamine, a chemical in our bodies that can produce pain, itching, swelling and redness of the skin. Within seconds after the sting, discomfort occurs at the local site and a small red welt appears. The welt can enlarge rapidly, depending on the amount of venom that was injected and the victim's sensitivity to the venom. The reaction persists for up to an hour, and then a small blister that contains clear fluid will form. Over the next half day or so, the fluid in the blister turns cloudy, and the area begins to itch.
Most children experience only a small amount of redness around the sting site.
A small percentage of children are sensitive to the venom and experience more extensive redness and swelling. Fortunately, only a very small number of victims have extensive allergic reactions such as breathing difficulties or widespread swelling of body parts. To help children avoid fire ants, parents should regularly check their yards and their children's play areas for the presence of the ants and their mounds. Then they should either eliminate the ants or make sure children avoid them. If a child is stung, apply ice to the bite site for 10 to 15 minutes.