Welcome To HealthcareMagic forum,
Taj,I would like to know is it that you are getting raised red rashes in the body or you are getting itching without any skin lesions.
Generalized itching all over the body can be because of various reasons like it can be any focus of infection in the body or stomach or even teeth . You need to take first a de-wormis tablet for the infection in stomach,an antibiotic to take care of any tooth decay
(if you have),and lastly a long course of anti histaminic tablet for itching.
You also need to see if there is any seasonal variation or not.
Other rare causes are then systemic or internal.
So if you can discuss in detail then we can help you better.