A Quick Overview of Spinal Decompression Therapy There are two forms of spinal decompression therapy: Nonsurgical spinal decompression therapy, which is a type of traction that can be used to relieve pain in the back. It involves the gentle stretching of the spine, taking pressure off of the disks, which cushion the space between the bones. Nonsurgical spinal decompression can be used to treat pain in the neck and back, but it's worth noting that some conditions, such as sciatica, can cause pain in the legs and feet as well.