Found this on a quick web search::Ants are a definite possibility! They keep getting me outside. Got little bumps on my ankles. I guess if she is allergic to them it could cause this rash! Ugh. Horrible!
Simple ant bites that don’t trigger a systemic reaction can often be treated at home. A quick, soothing salve can be made from baking soda and water (mix one tablespoon of baking soda and add enough water to form a spreadable paste). Small also recommends a 50-50 mix of apple cider vinegar and water, applied with a cotton ball three times a day for several days for soothing relief of ant and other insect bites.