You have nerve compression in the cervical area.
It can be diagnosed by examining the area of the arm involved, which defines the nerve. Alternately an MRI is commonly used. X-rays are obsolete for this purpose.
The compression could be due to a narrowing of the passageway through which the nerve passes or a deterioration or misplacement of the cervical discs. The problem could be due to an old injury (sudden flexure of the neck in an auto accident, for example), arthritis, or degenerative disc disease.
Definitive diagnosis can be performed by lying on your back and having someone apply axial traction while you have the tingling.
An EMG is sometimes ordered, but is not really necessary.
A cervical collar is contraindicated because it reduces muscle tone, as are muscle relaxers, although many physicians incorrectly prescribe both treatments.
Once you get an MRI, a decison can be made for treatment.
Often range of motion exercises (rotating the head 360 degrees while you hear the "crackling") and intermittant mild traction are recommended. Traction six to fifteen minutes six to ten times a day for starters with two hours in between. An anti-inflammatory is usually prescribed. Ibuprufin or prednisone, for a few days. Plus good hydration.
could be nerve compression, carpal tunnel, etc. If not better see physician.
sounds like a nerve (pinched)