no universal amount everyone needs immediately after waking.
One regular glass—roughly **200 to 350 milliliters**—is enough for many people to start the day.
Your overall daily fluid needs depend on:
* body size
* physical activity
* climate
* diet
* pregnancy
* medications
* kidney or heart conditions
You do
not need to force down a liter of water as soon as you wake up.
## Can Drinking Too Much Water Be Harmful?
Yes.
Drinking extremely large amounts of water in a short period can dilute sodium in the blood, a condition called **hyponatremia**.
Possible symptoms
