Sounds like hives? I got hives (red, raised, itchy bumps like mosquito bites) head to toe after I started predisone (of all things)...They switched me to a different steroid and they went away. Hives are an allergic reaction. Definitely call or see your doctor. Make sure it's ok to continue the Humira.
1 fistula, crohn's colitis, limited to large intestine
Compounded budesonide 3mg/daily, Cimzia, MTX . Dx Osteoporosis 10/08 started Forteo 1/27/09