"Bed Of Nails" is a legitimate company that offers acupressure mats and pillows. These products are designed to help release built-up tension in your neck, back, lumbar spine, and even the arches of your feet. The mats and pillows use small plastic spikes to target pain, ease tension, and promote relaxation. The "nails" don't penetrate the skin, making the pillow an acupressure and acupuncture hybrid. Many users have reported relief from pain and stress after consistent use. However, the initial sensation might be uncomfortable for some.