I early drink water i drink lots of other juices and sweets and stuff. when i drink a good amount of water, my brain feels like it had a shock moment?

Hi fluid intake: Regular fluid intake is healthy. Optimal fluid intake is about 1 cup or 2 cups per hour. 1 cup is 8 ounces. Consuming more than 4 cups in one hour exceeds kidney capacity for excretion. Ifone does that, then the excess water enters tissues, including brain, and causes internal organs to swell, including brain. High intake in short periods of time will cause headaches and harm to brain.