Hello, I'm a young male in his late twenties who's going on two years with PT. It's gotten worse throughout the time I've had it. I've had many many tests (Several repeated MRI/MRAs, cerebral angiogram, carotid doppler etc). I've been to see several neurologists, ENTs and neurophysiologists. No one can figure out a cause. Every test is totally normal. Sometimes I'm able to just go on living my life and not think about it that much, but other times (like now) it's horrific. It litterly keeps me up and is very hard to live with. I also have a hard time believe there is nothing harmful causing it which makes it even harder. Any thoughts or advice would be greatly appreciated.