Is it normal that when i hold my pee in for a long time, it begins to hurt?

How do you not know this? Yes. This is your body's way of telling you to eliminate that waste. The bladder is only so big and is constantly refilling itself. If you don't go, it causes pain and allows sediment to form which leads to kidney stones and a poorly functioning bladder.

Stop doing that you moron.

I see Kidney problems and UTI's in your near future...

Don't hold your pee in?

My bladder disappears after holding it in 30 minutes. I don't urinate on my self, my urine just...disappears.

It's your bodies way of telling you to get your ass to the bathroom. You shouldn't be doing that in the first place.

of course buddy

Keep doing it.

Omai wa moh sindyru.