9 Warning Signs of Water Deficiency You Need to Know


1- Dry Mouth

 Dry Mouth© carrieibbetson

Experiencing a dry mouth is one of the most annoying signs that you aren’t drinking enough water per day.

In fact, there could be other causes of a dry mouth, such consuming plenty of salty food, medication, or after a night of drinking alcohol.

However, this is an informative sign that you need to get more fluids. You should simply increase the amount of water you drink per day and this feeling should be gone.

2- Headaches

Headaches© Listovative

If you keep experiencing frequent and prolonged headaches, it could be a warning sign that you aren’t drinking enough water.

A headache is actually your brain’s way to alert you that something is wrong and that you need to do something about it.

In fact, most of the human brain is made up of water. So if it’s lacking it, it would start sending signals in form of a headache to tell you that you need to drink.



  1. I’ve been an ER and Critical Care RN for more than 32yrs. and have seen more than my share of people who come in to the ER suffering from heat exhaustion and/or heat stroke (the latter can have a body temp of more than 108). You listed “thirst” last. You would be wise to add that by the time you are feeling thirsty you are already suffering from dehydration and heat exhaustion or worse is not far behind unless you start rehydrating yourself with fluids that are non-alcoholic and that don’t contain a lot of sugar. I live where the humidity is often as low as 3% when the temperature outside is over 100 and many people don’t realize they are losing water through sweat because they don’t feel or see it. We usually tell people to drink at least 32 oz. of fluids an hour when they are out in the heat and never to wait till they feel thirsty.

  2. I know I don’t drink enough water I have a lot of these symptoms plus I only have 1kidney I hardly am ever thirsty except when I am in a car how can force myself to drink more water?

  3. I drink a lot of water as I was born in South Africa and it is hot there. I now live in the UK and still enjoy drinking water.

  4. Don’t drink any water. Don’t like it. Even cold water on a hot day makes me gag. I would have a cup of tea. Or a cool beer if I was thirsty. I am now 52 years old and I never get ill. No sickness or any visible signs of dehydration.

  5. Your comment that hunger is a sub-hydration symptom is a double-edged sword. Sub-hydration leads to weight gain by triggering an eating response when in fact you don’t need any more calories. Drinking ice water, vs room temperature/tap water, also serves to lower core temperature, which triggers increased metabolism, leading to more calorie burning. Drink ice water in lieu of eating = fat loss. Not theoretically – in actual, measured practice.

  6. Very good article, and right on point. All the comments were on target as well except for the one who doesn’t drink water. It will , if it hasn’t yet, affect him in a harmful way. Especially his brain. and heart.