Dear doctors I am in 4th month . From last 15 days i have been suffering from itching in my whole body cause sevre itching in night but left no marks or rashes. I also feel thirsty even i drink 3 litres water every day. And go for toilet 10 to 15 times in aday in night became worse 4 to 5 times. But my thirst not saturate . So what could be the reason for such itching from neck to feet.. Also i have done test in july for hepatitis B and c but result was normal. So what is possibility . Help me.. I have told all symptoms.