Any repetitive action can wear out the joints that connect them. Factory workers and people who type for a living can become disabled very easily by Carpal Tunnel Syndrome.
There is hope before it happens and during. First, step away from the keyboard. Take a break from the repetitive actions you are doing. Flex the muscles, do some excersises that will move the joints and muscles in different ways. If need be seek out the help of occupational therapists who can recommend the therapy that will work for you.
Do you like to swim? Not only with the water help, but the motions in swimming will help as well.
Keep your hands warm in a cold environment. If need be, get fingerless gloves so you keep the control of the tips of the fingers, but keep the wrist warm.
So if you’re experiences numbness, tingling, or pain. Relax, step back. If it continues, seek professional help. Do not fret, there are solutions to this and it doesn’t have to consume your thoughts and bring you down. There is a lot of information out there.