A trigger point is a painful area in a muscle. It may feel like there is “knot” in the muscle or an area of tightness. When pressure is applied to the trigger point, the pain spreads out to other areas of the body.

A trigger point injection is a shot that is given in this painful spot.

Thigh Muscles
Posterior Thigh Muscles
If you have a trigger point in the thigh muscle, the doctor can give an injection to relieve pain.
Copyright © Nucleus Medical Media, Inc.

Trigger point injections are given to reduce pain and increase physical functioning so that you can participate in a physical therapy program.