My dad is 53 over the last week he is has tingling in left arm. it went away when he hung his head. now he has kink in neck and arm pain wontgo away?

Tingling: He may have cervical nerve impingment. Cervical x rays or an MRI are in order.

Cervical root pain: Your dad is describing a pinched nerve in his neck. He should see a neurosurgeon or a spine specialist who can examine him and recommend a course of treatment to eliminate the arm pain and tingling.

Could be impingement: The cervical spine has nerve roots which exit and travel through the neck into the axilla and then, into the arm and further south to the hand. If he has tingling and now pain radiating into the arm which changes by moving his neck then, one of those nerve roots from the c-spine may be impinged or "pinched." may resolve on its own but if not i would recommend an evaluation with a neurologist.

See your doctor: Although he might have cervical spondylosis and a potential discogenic nerve compression within neck, other possibilities exist, such as a problem within the brachial plexus, but bothersome to me are the vague complaints involving left arm, especially in a man in mid 50's, as this could potentially be a warning sign of heart blood flow issues. See a doctor asap, and get this all addressed.

See an MD: Most likely a nerve pinched in the neck which often resolves on its own with conservative management within about 6 weeks. Some 30% of pts need surgery for this if conservative is unsuccessful.

Evaluate Neck: If you are not improving have your doctor order a cervical spine mri. Many times a herniated disc in the neck can cause arm pain especially if you have not improved with the medications and physical therapy. If it is a herniated disc you may need evaluation from a spine specialist to determine what other options might be needed (injections, surgery, etc) to help reduce pain.