Thanks for posting your query at DoctorSpring.com
I can understand your concern.
There are many causes for itching all over the body.
It could be due to
1. Anaemia i. e low haemoglobin
4. Liver disease
It could also be due to
1. Extremely dry skin
2. Urticaria if you are getting a rash with the itching.
I would recommend that you take an anti allergic tablet to control the itching. Tab. Allegra once daily to help with the itching.
Application of calamine lotion will help relive the itching.
In case of dryness, you need to apply a moisturizer instead of calamine lotion.
Also, it would be best to ask your doctor to call for blood tests to rule out the above causes.
Please let me know if you have any queries.