In that part of the body where fluid is delayed, there is a pressure increase, which leads to pinch nerve endings, causing pain. (doctor-info.website)
It is most commonly used for chronic arthritis in older dogs, acute tendon and ligament injuries like CCL tears in knees, and spinal injuries like herniated disks and nerve damage from pinched nerves in the neck. (baywoof.com)
I just pinched a nerve; I'll be okay.» (health.com)