How do I stop my bladder from being so overactive sometimes I use the restroom more than 4 times in a hour?

sometimes all I drink is water. I have no clue why i have to be the one running to the restroom every 15 mins.

Well, perhaps you have an overactive bladder and medication can be prescribed to ease the feeling to go. Maybe a Urinary Tract Infection. Well, if you did drink caffeine, it would irritate your bladder...but water shouldn't be a problem unless you are drinking tons of it. I suggest seeing a doctor about the problem.

go to your doctor he/she can prescribe a medication that will help you go less.

You may need to be tested for diabetes one of the symptoms is excessive thirst. Check with the doctor!

Water is a diuretic and it will make you go pee a lot if that's all you drink. Watch, cut down your water consumption and you'll see you should pee less.

Unless you are guzzling water by the gallon you shouldnt have to go once every fifteen minutes. See a doc. It could be a medical problem.

maybe youre drinking too much water.
anything at the wrong dosage is a poison.
ask your doctor.

Go to your doctor. You might have bladder problems. If you eat and you go a lot, your body isn't absorbing the nutrients from the food before releases it down the toilet.

flushing your body is a good thing. It could be that your body is just expelling something that it wants to get rid of. If this has persisted for more than a week or so you may want to have a urinalisis. Cafiene is a strong diuretic as well as some juices like cranberry these will increse urinating and sweating. If you are thirsty alot then definately get checked for diabetes.