Hi Venkat. Sorry that you are having trouble. Here is a suggestion: thrush is usually from an overgrowth of yeast. I have candida which is the same overgrowth but in my digestive tract. If you can stay away from sugar as was suggested then try to. Sugar feeds the yeast. Try drinking keifer if you can get it down. It is like liquid yogurt and will help to restore some good bacteria. My husband has been obsessive about brushing with fluoride toothpaste and using the trays until his mouth got too sore. That seemed to help too. Stay strong!