Trigger point injections (TPI)

Are TPI safe and effective in the management of chronic non-malignant pain ≥ 3 months’ duration?

What is known
Evidence indicates that TPI:

What we don’t know

A short trial (three sessions of TPI) is worth trying in focal chronic pain of the neck, head and shoulders in a patient who can be relied upon to do stretching exercises.

Scott A, Guo B. Trigger point injections for non-malignant chronic pain. Edmonton, AB: Alberta Heritage Foundation for Medical Research (HTA 34). Available from URL:, August 2004.