Wiktionary
toss and turn
vb. (of someone lying down, asleep or attempting to sleep) to be constantly moving, unable to lie still
Usage examples of "toss and turn".
All I wanted to do was sleep, but because my skin was burning I could only toss and turn on the bed.
In the late hours she would toss and turn, then fall into a light doze, only to awake again, nervous and groggy, to toss and turn some more.