My baby has what looks like old mosquito bites on his arms chest back and legs. Some have fluid in them like a blister. When he gets upset or too hot they look like brand new mosquito bites again, but don't seem to bother him. He still has full range of motion in the creases of his arm where he has two fluid filled blisters. They've lasted for more than 2 weeks. I use all free and clear detergent. Has anyone else run into these curious spots or any suggestions?