An ant bite occurs when an ant uses its mandibles to pinch the skin, often as a defense mechanism. Some ants, like fire ants, can also inject venom through a stinger, causing pain, redness, and swelling. The severity of the reaction can vary depending on the individual's sensitivity and the type of ant involved. Most ant bites are not serious and can be treated with basic first aid, such as cleaning the area and applying a cold compress. However, allergic reactions can occur in some people, leading to more severe symptoms that may require medical attention.