What is this feeling and what causes it, and how can I get rid of it? This happens a lot. I was laying in bed last night trying to get to sleep, and I felt like I just *had* to move. It was non-negotiable. I ended up flopping around like a fish for a whole hour. Literally flopping around like a fish acting like some kind of contortionist. It was the only thing that could satisfy my desire to move. I couldn't get comfortable. Eventually I fell asleep but not until after hours of contorting. Antihistamines or other anxiolytics seem to make it worse.