Any family history of diabetes? Excess thirst can be related to diabetes, hypothyroidism, hyperadrenalism or very high levels of sodium. It could just be your workouts or caffeine making you thirsty. If it's abnormally high I'd have it checked out.
thanx for the feed back, no flavored water just water about 2 gallons. Always trying to go to sleep at night but cant because i gotta smack some f*#@ing water. It only happens at the end of the day after Ive already consumed about 1 1/2 gals.