I'm getting itching from my head to toe for last two days, this is the first time for me. ?

Allergy: If you are itchy from head to toe. Please try to think what you have eaten in last 24 hours. If you start a rash get to er for evaluation. If itching gets worse get to er. This can be caused by allergic reaction to medications, foods or allergirs to pollen, dust or a multitude of things. If it subsides make an appointment with pcp to evaluate the issue or an allergist.

See a dermatologist: Who can possibly help you. Consider taking Benadryl (diphenhydramine) if not allergic to it.