> So it isn't necessarily something dangerous or important?
Who knows? You provided a very small amount of information to a bunch of non-medical people. It could be something unimportant, or it could be something very important. But a blood sugar test is very quick and easy, or can be part of a regular blood test. If you are really peeing a lot, you should certainly get it checked out.
If you're diabetic, your kidneys generate a lot of urine to flush out the excess sugar in your blood. That dehydrates you and makes you very thirsty.
NtroducingMyself> Yes eatting a lot of sugar can also be a cause.
For a 14-year-old? It's possible that, in large amounts and over a long term, sugar consumption might lead to insulin resistance (type 2 diabetes). There is no definitive research that I'm aware of.
I suppose the calories in the sugar can make him overweight, which will make him a higher risk for type 2 diabetes. But eating a lot of steaks will do the same thing.