Compartment syndrome occurs when excessive pressure builds up inside an enclosed space in the body. Compartment syndrome usually results from bleeding or swelling after an injury. The dangerously high pressure in compartment syndrome impedes the flow of blood to and from the affected tissues. It can be an emergency, requiring surgery to prevent permanent injury.
Decompression is a type of surgery used for nerve pain, such as from trigeminal neuralgia. The doctor cuts open your skin and then tries to move away blood vessels or other body structures that are pressing on nerves and causing pain.