Don’t forget muscle spasms and cramps. Such a big one for fibro as you get dehydrated faster than the average person.
Water water everywhere

Thirst dizziness changes in urine colour (darker yellow) dry skin lips tongue. Headaches fatigue.

If confusion rapid heart beat very little or no urine. Seek medical help

You know there’s electrolyte capsules that can be better absorbed into the body. Cheaper option too.

Essentia and Core water have balanced electrolytes and aren’t flavored-no citric acid for those with sensitive stomach. I also keep Vitamin Water, Gatorade and Liquid IV on hand, especially when I’m out and about on my mobility scooter. Summer heat isn’t the only time you can become dehydrated as winter cold also pulls fluid from the body while it works harder to keep you warm.
Whenever I start dragging in energy and I’m not hungry, that’s when I might need some electrolytes.

Dizziness can also be a sign of low blood pressure