What could numbness in the fingertips mean?
Could be lots of things but I’m taking it you’re still young and can with reasonable doubt rule out heart or other serious issues. This sounds more like a bundle of nerves in the neck, if one or a few gets squeezed or pinched either through injury, arthritis, or poor posture you can get tingling or numbness in the fingers, specifically the ring and little fingers, but can affect the others depending on the nerve supply. Manipulating the neck, or doing neck exercises should help, failing that, go to doc and see what he recommends and also to check for anything else to be on safe side.
