Trigger point injections are a pain management treatment that involves injecting a local anesthetic, sometimes combined with a steroid medication, into a trigger point to relax muscles and relieve pain.
A trigger point is a tender area of muscle that develops when the tissue surrounding the muscle, called fascia (or myofascia) contracts and sticks to itself. A trigger point is often identified as a “knot,” a bump under the skin that can cause pain in the area where it has developed.
In some cases, a trigger point can even cause pain in another area of the body when it affects a nearby nerve; this is called referred pain.
Why trigger point injections are used
Trigger point injections are used to treat chronic pain in the:
Chronic pain in the areas mentioned above is typically associated with:
Injury to the muscle
Poor mechanics that lead to stress of the muscle
Trigger point injections are also used to treat pain associated with certain medical conditions, such as:
Myofascial pain syndrome