The answer to 'why is my fire ant bites' is that fire ant bites are caused by the venom injected by fire ants when they sting. Fire ants are aggressive insects that will attack in large numbers if their mound is disturbed. Their bites can cause painful, itchy swelling and redness that can last for several days.
Fire ants are common pests in many regions, especially the southern United States. They build mound-shaped nests in the ground and will aggressively defend their colony. When fire ants feel threatened, they will swarm and sting multiple times, injecting venom that causes a burning, itchy sensation. The bites often develop into small, fluid-filled pustules that can become infected if scratched.