My Husband has these raised red bumps on his upper arms and legs, they have been randomly appearing over the last couple of days. They range in size from a small dot to a nickle size, and are in clusters of three or more. When they first appear they are just red and itchy, after scratching they scab over quickly with a purplish scab. There is no oozing or puss, no bleeding, just itchy and sting slightly. We have tried lotion thinking it was dry skin , and allegra thinking it might me an alergic reaction, but neither have helped. We looked up pictures of hives and ringworm , but neither look like these. Any ideas or suggestions on what they could be or how to treat them?