I have had a headache in the lower left back of my head. its making muscles in my neck tingly and my head twitch. what do i do?

Try this: Take over the counter tylenol, (acetaminophen) apply warm compress. It's usually from muscle strain. If the pain originates from the back of your neck and move upwards, it could be from a pinched nerve from arthritis in your neck spine. Check your blood pressure- should be lower than 130/80. Any trauma, fever, vomiting? Go see your dr if you don't feel better.