Ever since the onset of my anxiety disorder a yr ago i started having head pain and neck pain, muscle twitches etc. and never before. why is this?

Anxiety Disorder: I understand your concern. Anxiety disorder can cause head pain, neck pain, and muscle twitches. Psychiatric treatment including psychotherapy, anti- anxiety medication, relaxation and meditation will improve your symptoms.

Sometimes connected: Anxiety and stress can lead to muscle tension with associated headaches and neck aches.