There is no official ranking of dangerous ants, but the ant that public health and extension sources single out in the United States is the red imported fire ant, because it stings repeatedly and some people have severe allergic reactions to its venom. According to the University of Florida’s red imported fire ant profile, it arrived from Brazil through Mobile, Alabama, or Pensacola, Florida, between 1933 and 1945, and 15 states had established infestations as of August 2008. Saela Pest Control is a residential and commercial pest control company that treats ants across its service areas. This guide explains what a fire ant sting does, when it needs emergency care and how to handle mounds on your property.
What a Fire Ant Sting Does
Fire ants sting when their mound is disturbed, and one ant can sting more than once. Texas A&M AgriLife’s fire ant medical information describes imported fire ants as aggressive ants that defensively attack anything that disturbs them and can sting repeatedly. University of Florida entomologists explain that a worker grips the skin with its jaws (mandibles) and then injects venom with its stinger. Because a disturbed mound releases many ants at once, a person or pet standing on one can be stung many times.
The sting causes a burning sensation, followed by itching and a red bump. The CDC’s guidance on fire ants and other stinging insects notes that these red bumps may develop into white, fluid-filled pustules within a day or two. Texas A&M adds that fire ant stings are easily infected and may leave permanent scars, so leave the pustules alone rather than scratching them.
Most fire ant stings are not life threatening, but they can be for people who are allergic to the venom. The CDC explains that venom-allergic people may experience anaphylaxis, a severe and potentially life-threatening allergic reaction that needs immediate emergency care. University of Florida entomologists describe the human toll from these stings as an important public health concern, with reactions ranging from local pain and swelling to anaphylactic shock.
Take the person to an emergency medical facility immediately if a sting is followed by any of these signs:
- Serious swelling
- Nausea
- Severe chest pain or loss of breath
- Severe sweating
- Slurred speech
Don’t wait to see whether these symptoms pass. Texas A&M notes that a severe reaction can follow even a single sting.
First Aid for a Mild Fire Ant Sting
For a mild reaction with only a few stings, first aid focuses on three things: getting the ants off, easing the pain and itching, and keeping the sting sites from becoming infected while they heal:
- Brush the ants off quickly and firmly, since the CDC notes they hold on to the skin with their jaws.
- Apply ice or another cold compress to the stings, as NC State Extension’s fire ant safety guidance recommends.
- An antihistamine may help with itching; follow the package directions, since the CDC notes it can cause drowsiness.
- Texas A&M suggests an insect-bite remedy with ingredients that deaden pain and protect against infection.
If a sting site looks infected or someone was stung many times, check with a doctor. Anyone who has had a serious reaction should follow Texas A&M’s advice to see an allergist, and ask whether they should carry emergency medication in case of future stings.
What to Do About Fire Ant Mounds on Your Property
The most reliable way to avoid stings is to find mounds early and keep people and pets away from them until they are treated. University of Florida entomologists note that mounds are built of soil and are seldom more than 18 inches across, and NC State Extension says they are common in open, sunny areas such as parks, sidewalks, road shoulders and landscaped areas. Check lawns, play areas and sidewalk edges, and follow the CDC’s advice not to disturb, stand on or stand near a mound. If children or pets use the yard, read about whether fire ant control services are safe for pets and children.
Digging out or flooding a mound yourself puts you within reach of the colony, and NC State Extension notes that fire ants are impossible to eradicate from an area, so control in infested regions is ongoing. Saela’s ant control follows an integrated pest management cycle of identifying the pest, monitoring activity, targeting treatment and evaluating results, and covered pests depend on the plan you choose. In a July 2019 Google review, Anne DeBrie wrote that Saela “got rid of our ants” and “came back when they said they would to follow up.” If you treat a mound yourself, use the product exactly as its label directs and keep children and pets away until the label says it is safe.
Saela quotes ant control by pest type, location, property size and visit frequency rather than publishing one price, so compare Saela’s plans and pricing and confirm that fire ants are covered. On Google, Saela’s Altamonte Springs, Florida location is rated 4.9 out of 5 from 341 reviews as of October 2026.
Frequently asked questions
Which ant is the most dangerous in the United States?
No agency ranks ants by danger, but the red imported fire ant is the one health and extension sources single out. It stings repeatedly when disturbed, and some people have severe allergic reactions to its venom.
Where are fire ants found in the United States?
The CDC says fire ants are found mostly in the southeastern United States, with a more limited range in New Mexico, Arizona and California. Mounds are usually in open, sunny ground such as lawns, parks and the edges of sidewalks.
What should you do about ants inside the house?
Ants that come indoors are usually looking for food, water, warmth or shelter, according to UC IPM’s guide to managing ants, so removing food sources and sealing entry points comes first. For a step-by-step approach, see the ant pest control checklist for homeowners.
If you’ve found fire ant mounds in your yard, book a call to schedule an ant inspection.
Who wrote this article?
Devin Hutchings (Marketing Director at Saela Pest Control) wrote this article.
Devin leads Saela’s marketing and growth strategy. He brings more than 15 years of marketing experience across Uber, C.R. England, Lugg, and Neighbor. His background spans customer acquisition, retention, and developing marketing channels for service businesses and consumer marketplaces.
