Works best for the following: 

Chronic and Episodic migraines

Episodic and Chronic cluster headaches

Tension headaches

Occipital neuralgia

Trigger points are areas in muscle that are very irritable, a band of tightness in the area of muscle itself. A trigger point may produce not only pain in the affected muscle, but in a distant area, including locations in the head and neck, called referred pain. Trigger point injections decrease pain and assist in breaking up the fibrous band.