I'm suffering with dehydration and usually tend to have white tongue, feel very thirsty all the time. So I have decided to drink much water but whenever I went to toilet and empiet my level of thirst increasing and my tongue is getting much coated and getting bad breath. Why is this happening to me. By the way im already done with intravenous fluid, orsl solutions, vitamin c tablets. This is being persisted for a large time now and kindly help me.