Friend had full body massage yday drank plenty of h2o as told woke this morning covered in a rash that varied and didn't cover everywhere but all over?

Clinic - ER if bad! This might be hives and if it spreads to the respiratory system it is really dangerous. Get friend to a clinic - a Benadryl (diphenhydramine) shot can keep it from spreading or be lifesaving. It could be related to the massage or allergy to one of the materials there. There is allergy mentioned so this is a good bet. Ask to have epi-pins available for emergencies. Good luck!
Body Oil Reaction. It is quite likely your friend is allergic to the body oil used during the massage.