For about two months I have been getting a creepy tingling on one leg. I remember the first time, it felt like ants were crawling all over my leg starting from the knee. I'm used to it now and expect it. It doesn't hinder my sleep but now I'm experiencing the same tingling when I stand - for example it happens when I brush my teeth. My leg often feels cold especially at night. What is this?
I use a CPAP machine since April 2015.
