question: My 10 year old son has a rash. The rash is in single bumps and straight red lines on his lower legs. He has small red bumps on his back and chest. The ones on his legs are very itchy. Could this be scabies? Would scabies cause him to break out in what looks like hives on his chest and back. There are no bumps in-between his toes or fingers. The bumps on his legs are hard.