Why Drinking More Water Makes You Feel Thirstier: Your Symptoms

The more you drink water, the drier your mouth becomes?

1.
Why have I been feeling increasingly thirsty despite drinking more water? I drink 1500cc of water between 8 and 11 AM, but if I don't drink water for more than half an hour, I don't feel thirsty.

2.
I feel that my sleep at night is decent (around 11:30 PM to 6:00 AM), but I start feeling fatigued by 9 AM and sometimes yawn continuously.
I'm unsure of the reason.
3.
Which medical specialties should I consult or what tests should I undergo for these symptoms? Thank you.

Fei, 50~59 year old female. Ask Date: 2009/05/11

Dr. Yang Hongzhi reply Internal Medicine

There is a significant possibility of having diabetes; you may consider visiting the endocrinology outpatient clinic.

Reply Date: 2009/05/11

More Info

Drinking water is essential for maintaining hydration and overall health, but it can sometimes lead to paradoxical feelings of thirst or dryness. This phenomenon can be attributed to several physiological and psychological factors. Let's break down your questions and concerns.

1. Why do you feel thirstier despite drinking a lot of water?
When you consume a large amount of water, especially in a short period, it can lead to a rapid dilution of sodium in your bloodstream, a condition known as hyponatremia. This dilution can trigger your body's thirst mechanisms, making you feel thirsty even after drinking. Additionally, if your body is not able to properly absorb the water due to gastrointestinal issues or if you are consuming water too quickly, it may not effectively hydrate your cells. This can lead to a sensation of dryness or thirst. Furthermore, factors such as high salt intake, certain medications, or underlying health conditions (like diabetes or kidney issues) can exacerbate feelings of thirst.

2. Feeling fatigued in the morning despite adequate sleep:
Feeling tired shortly after waking up can be influenced by several factors. Sleep quality is crucial; even if you sleep for a sufficient number of hours, if your sleep is fragmented or not restful, you may still feel fatigued. Conditions such as sleep apnea, where breathing is interrupted during sleep, can lead to poor sleep quality and excessive daytime sleepiness. Additionally, dehydration can also contribute to fatigue. If your body is not adequately hydrated, it can affect your energy levels and cognitive function. Nutritional factors, such as low blood sugar or inadequate intake of essential vitamins and minerals, can also play a role in morning fatigue.

3. Which specialists to consult and what tests to consider:
Given your symptoms, it would be prudent to consult a few different specialists. A primary care physician can evaluate your overall health and may refer you to a nephrologist (kidney specialist) if there are concerns about your hydration status or kidney function. An endocrinologist may be necessary if there are signs of diabetes or hormonal imbalances. Additionally, a sleep specialist could be beneficial if sleep quality is suspected to be an issue.
In terms of tests, consider the following:
- Blood tests to check electrolyte levels, kidney function, and blood sugar levels.

- Urinalysis to assess hydration status and kidney function.

- Sleep study if sleep apnea or other sleep disorders are suspected.

- Thyroid function tests to rule out thyroid issues that could contribute to fatigue.

In conclusion, while drinking water is vital for health, excessive intake without proper absorption can lead to feelings of thirst and other symptoms. It’s essential to listen to your body and consult healthcare professionals to address these concerns adequately. Adjusting your water intake to a more moderate level, spreading it throughout the day, and ensuring a balanced diet can also help alleviate some of these symptoms.

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