My 6 year old son has developed a rash that looks like veins on his hands. He had a rash on his arms and legs last week as well, but they looked more blotchy. He doesn t have a fever and hasn t had one since he started developing the rash. He says the current one itches and the ones he had last week also itched. Not sure what it is or what I should do. Should I be worried and take him to Urgent Care or wait until Monday when the doctors office opens up.