Hi welcome to Health care magic forum.
Thanks for choosing H.C.M.F.
You are getting itching of the body only after the bath, so you must be allergic to the things you are using to take bath. like soap, shampoo, any thing to add to water while taking bath.
should always be with continuous itching, and more in some occassions like taking bath etc. It should contain dark coloured patches.
I advise you to avoid the soap and shampoo you are using so far and change to some other brand. avoid using seafoods like fish, prawns, and crabs etc.
I advise you to consult a dermatologist
for diagnosis and treatment.
Wishing for a quick recovery.