You may be familiar with acupuncture. Accupressure mats work similarly. Each circular disk comes with multiple pointed ends that pricks. Lying on an accupressure mat for 15mins to half an hour stimulates blood circulation, relaxes muscles, and promotes faster and deeper sleep.
It takes a few uses to get used to the pricking, but soon you will be loving the stimulation. There's a host of other benefits as well. I love how using the mat gets me to deep sleep faster.
Caution with removing the mat in the dark, as I've accidentally pricked my skin a couple of times.
Available from eBay, Amazon, and under various brands.