Age is bringing arthritis to my hands. It's not debilitating, but it can add a nagging ache to my finger joints after a long day of using my hands. It's part of the aging process; especially for someone like me. I've spent a substantial portion of my life having to grip things tightly, such as finishing concrete, or driving nails.
We wear out. Like old cars, something grinds against something else, until the wear causes damage.
Getting old is not for sissies.