It depends on the species of ants, most people tend to experience one or more of the following symptoms such as burning sensation, redness, mild swelling, dizziness, itching and pain among others. Field Ant Identification Field ants do not have stingers; however, many species feature an opening on their abdomen through which they can spray formic acid when threatened. When they do bite, some species of field ants simultaneously spray formic acid, which can be excruciating. They do not sting and won’t bite unless their nest is threatened or aphids under their protection are at risk. Some insects also carry disease, such as West Nile virus. More serious cases of ant sting can result to red blisters that appear as pimples. Rarely, insect bites and stings, such as from a bee, a wasp, a hornet, a fire ant or a scorpion, can result in severe reactions. Most reactions to insect bites and stings are mild, causing little more than redness, itching, stinging or minor swelling. When shot onto a patch of skin that has just been pinched by their mandibles, the effect is very similar to being stung. Field ants are usually docile, especially when compared to aggressive species such as fire ants. Ant bites can be explained as small red marks.