Something kind of strange happen to me last week. I am pretty new to road biking but have been doing a lot of rides the past few months and even did a century a few weeks ago and my hands have been fine. Last week I did my 2nd century and and the weather turned pretty bad with snow/rain and very strong headwinds which took me 8.5 hours of riding time to finish. I pushed myself extremely hard.
That night I noticed that my hand strength was a lot weaker. My hands really didn't hurt but I had a hard time gripping things and then using my hand strength. Doing such things as opening up a jar, or peeling back the wrapper for a piece of string cheese. I figured my hands where just tired and that they would recover pretty quickly. It has now been about a week and even though I have a little more strength, it is not near what it use to be. Like I said, my hands don't hurt at all and feel pretty normal but when I try and use them to do something that requires a little more strength, they don't really hurt, but I just don't have the muscle to do certain things.