I have itching all over my body. especially my hands,feet,back,legs and arms. raised red bumps. ?

Allergic reaction: These may be hives. A generalized allergic reaction to something external or internal is likely. Think of what you ate ,used or handled shortly before this reaction. Take an antihistamine like benadryl(can cause drowsiness) or claritin(nondrowsy), but I feel benadryl would be more effective. A dermatologist or allergist should be consulted if you get no relief.