Since about one month and a half ago, he has been breaking out with rash. It started with one, two sspots on his legs, arms and the back. But now it's all over his back and on his tummy. He has done allergy testing all negative result. Also blood testing for viral infection and auto immune: All normal. He has taken Rupatidine 10ml per day for about 2 weeks, it worked in the begining but didn;t work anymore. After this he was also oneprednisone 10ml for 4 days. It didn;t seem to help either.