Hi
its due increased metabolic rate or in common terms is excessive heat .
stop taking refrigerated water,beverages particulrly spicy and Non veg foods.
take buttermilk,coconut water,barley water all the menu in 200ml qty.
you can add fruits too guava,pomegranate,watermelon.
Next Steps
check your Esr,
thyroid profile once
Health Tips
take luke warm water every time you have water