Drinking 5 litres of water per day
Is it normal to drink five litres of water per day? On a typical day I will drink 14-16 relatively large glasses of water, which comes up to about five litres, this is excluding water I get from food and the three or four cups of tea I usually have each day.
I found an online calculator which said that for my weight (97lbs) I should be drinking 1.5 litres of water. But if I go more than about ten minutes without water, my mouth starts to feel extremely dry and I start to get a headache. I have to carry a 750ml water bottle with me wherever I go.
Is it okay to drink this much water?