I got a neck injury at work. I didnt even know it was severe at first. It felt like a muscle pull. Two weeks later I started getting numbness and tingleness in my left arm. I was still working at that point. Long story short, I ended up needing a pretty massive surgery. It didnt happen until 4 months later because initial mis-diagnosis. About two weeks before my surgery I couldnt move my left arm anymore because my discs were severly pressing on my spinal cord. There was definitely a long slow progression of just getting worse and worse.