question: My 6 year old son has had a rash since this morning. Some spots are around a nickel in size. He has had this happen before, and we figured out it was a new detergent. However, this time, we haven t changed our detergent, and he has now said that it feels like pins and needles in his joints. We have been using Benadryl and Cortaid today to treat. He hasn t had a fever. Thanks for the help!