Alcohol is a diuretic, meaning that it inhibits the pituitary gland from secreting vasopressin (antidiuretic hormone), which then causes the kidneys to reabsorb less water, and instead excrete it out of the body.
Your head is pounding and you had one too many drinks last night? Sounds like a doozy of a hangover. Luckily, these pro tips should aid in your recovery.