My three year old was holding an American Dagger Moth caterpillar and told me it stung her on her arm as it was crawling about. The "sting" so to speak actually made her itch for a little bit. It wasn't until days, or even a week later that she developed little skin colored bumps on both arms. I am assuming the "rash" bumps are from the caterpillar but not 100% sure. She does not itch, has no fever, and they are basically hard to detect unless you look at them in certain light. I am waiting for them to disappear and it has been over three weeks since the caterpillar sting.