Lidocaine Injection Versus Sham Needling in Treating Whiplash Associated Disorder

Inclusion Criteria: * fulfill the Grade II Quebec Task Force classification of WAD, * with identifiable myofascial trigger points ( which occur with or without a taut band), * reproduction of recognizable pain with sustained pressure ( up to 10 seconds) on trigger points * aged 18 to 70 * a good understanding of informed consent and willing to attend this trial. Exclusion Criteria: * have serious injury such as fracture and internal bleeding * suspicion of upper cervical instability or neurological deficits * clinical evidence of radiculopathy * a history of active cancer, central nerve disorder, blood clotting disorders, needle phobia * anticoagulant medication user * previous experience with any type of needling for myofascial pain