I wonder if anyone has had the same problem as I have experienced recently. I feel a recurring stiffness in the shoulder/upper right arm area. It is a funny kind of stiffness because it can go away if I stretch my arm only to return immediately when I move my arm back to its original position. It only occurs when I move my arm in certain ways and directions. It is an irritation rather than a disability - I am typing this with both hands without the slightest difficulty - but it would be useful to find out what one could do to eliminate it.