I suffer from dry eyes mgd, dry skin dermatitis on my face from dehydration due to low body fluid. how can i rehydrate my body back to normal?

Up Fluid Intake: Start drinking about 10 glasses of liquid with some salt a day..Here is a recipe for such a drink, https://tinyurl.com/y76ssp2v. You can also use a commercially available drink. You should be feeling better within days. You will gain weight from doing this and also start urinating a lot. If you gain weight, but don't increase your urination or get out of breath, see your doctor ASAP.