WebMD suggests treating ant bites on a dog by applying ice packs, a baking soda paste or calamine lotion. A dog who experiences a severe allergic reaction to ant bites may also need to be taken to the veterinarian for emergency treatment. According to GustoDogs, fire ant bites should also be washed with antibacterial soap over several days, and a dose of Benadryl may be needed to control any reaction.
As WebMD explains, applying a paste of baking soda and water directly to the bite area can provide some relief to a dog bitten by ants. Applying an ice pack reduces the swelling. Pet Assure also recommends applying milk of magnesia, hydrocortisone cream, oatmeal or an Epsom salt solution.
Pet Assure points out that ant bites usually show up on a dog's belly, but they can also appear on the face or head. Ant bites are most likely to cause itching and swelling. More severe reactions include hives, wheezing, weakness, fever, vomiting and diarrhea; these more severe reactions require immediate attention by a vet.
In some regions, fire ants pose a problem to dogs; their bites create an intense burning sensation. Remove fire ants from a dog's body by brushing them off briskly with a towel. Do not use water, because it causes the fire ants to grasp more tightly to the dog. Dab the bites with ammonia, then wash the affected areas twice daily with antibacterial soap. Apply cold compresses and betadyne.