A Study of the Combination of Electrical Stimulation and Dysport® in Myofascial Pain Syndrome.

Inclusion Criteria: * Chronic neck and shoulder pain for at least 6 months, refractory with other conservative treatments * Presents at baseline with pain score greater than 50mm on 100mm length VAS. Pain score will be measured as overall pain over the 7 days preceding the visit during activities * Active trigger point (TrP) defined as a tender spot localised in a taut band of muscle fibres associated with tenderness AND referred pain recognised by the patient into well-defined areas that are remote from the TrP area at palpation AND preferably local twitch response at palpation AND/OR jump sign at palpation Exclusion Criteria: * Disc/bone disease * History of surgery on neck * Neurological deficits, neuromuscular junction disorder, Motor Neuron disease * Patient has received anesthetic injections to the target trigger point within 4 weeks of study enrolment, or corticosteroid injections within 3 months * Systemic inflammatory disease * Hypersensitivity to Dysport® * Diffuse tender points, or diagnosed with fibromyalgia * Previous electrical stimulation * Previous injection of Dysport® within 6 months of study enrolment