text: The stiffness in the neck indicated you have a problem that has increased to allow an inflammation process to involve the nerves of the brachial plexus..(the nerves to the arm). You will find there is still restriction of motion of the head to one side. When a nerve has pressure on it for any extended period of time, it acts as an anesthetic.. explaining the numbness. The tingling telling you a nerve is under a state of irritation. Is similar to what the aftermath is after you hit your crazy bone.\n\nPerhaps you should consider highly, the consultation with a doctor of Chiropractic.. and have the cause of the problem taken care of.