I'm a female and when I have to urinate I become aroused if I hit my pelvis area or suck that part in? Why?!

It feel really righteous and I prefer it over masterbation sometimes. Please serve if you enjoy any impression why this may be
Answers:

I've have PID (Pelvic Inflammatory disease) twice. And it keep flaring up?

I know exactly what you indicate. I first notice that sensation when I be a preteen or at lowest a young-looking teen.

I also know that it's not anywhere hard by your clitoris. It's because the pressure on your bladder is hitting your G Spot.

If you check out the wikipedia article on G Spot and see where on earth it's located, it'll grant you a better impression of why you're getting aroused:

http://en.wikipedia.org/wiki/g-spot...

Enjoy!

I get my length?

Well your urethra (pee hole) and your clitoris is almost duplicate point. thats probably why you become aroused when you urinate.

I am 14 and i am have my term close to evry two or three months. i am really stressed out.?

it is your clitoris (upper nouns "bump" above urine hole)
try massage or rubbing it -rather than hitting it -for more pleasurable results.