In Jan I developed numbness in my fingers. In weeks it moved up the arms and at night I was in so much pain while laying down that I would wake up. I chose to see a chiropractor who became a chiro, because he had the same thing happen to him as a rugby player, but the doctor he found could only offer pain meds and an operation.
Within a few hours of my first chiro appointment the pain was cut in half.
The chiro said it did appear to be pinched nerves in my shoulders, but without electrical nerve tests he couldn't be 100% positive.
I saw the chiro 3x/week for months. The pain disappeared and the numbness was almost totally gone until 3 weeks ago when I started lifting heavy again. I've narrowed it down to arm day. Two days after arm day I have increased numbness and now pain, but within a few days it subsides. I've talked with other guys in my gym and many get some numbness from time to time.