question: My 10 yr. old son, 63 pounds, has had vomiting and extreme abdominal pain for 24 hrs with 2 more days of just abdominal pain. No fever.  4 days later he had a rash only on his cheeks then 2 days later the rash spread to different patches on his arms and legs. Dr. put him on prednizone and the rash seemed to go away. 1 day after last dose of the prednizone it started again with the vomiting (only for 24 hrs)and again 3 days of tummy pain for 2 more days. No fever again.  There was about 3 weeks in between each of the the vomiting but the rash has been their for about 2 weeks sometimes very itchy. Theyve done xrays, taken blood work to see if hes allergic to any respitory/food allergy, urinealisis, and just regular blood work. Please help