I drink lots of water but i always feel dehydrated. help.

Activity?: So you may be doing a bunch of activities that are dehydrating, and you need the additional water. Or you may not have enough electrolytes - start drinking 1/4 of your fluids as gatoraid, poweraid, etc. Sometimes this can herald an illness, such as diabetes. It would be best to discuss this with your doctor, who may order some tests to rule out certain illnesses. Good luck!