Originally Posted by Stix Zadinia
The whole hand, and fingers..
OK, and again, the timeline ...
4-6 months later you stopped cycling.
The hand started going numb the next day.
It has been doing numb for a month now.
You have not cycled in that month.
If that is the correct timeline, go to a Dr or chiropractor and tell them that.
BTW, in answer to your question: "What do you mean by bike fit? What incorrect measure(s) can cause hand discomfort/numbness on the bike?"
The fit of a bicycle is very, very important. You and the bicycle are a machine together. If part of the machine is not set up correctly, the machine will not be efficient, and could break down (in this case, that means you could develop an injury).
This is why we keep repeating over and over in your other thread that the fit of the bicycle is so much more important than the look of the bicycle.
More specifically ... a few examples ...
-- if your bicycle is set up so that you are putting too much weight on your hands, you'll have hand, arm, and shoulder issues.
-- if you find that you have to push yourself back while you ride, you'll have hand, triceps, and shoulder issues.
-- if you have to reach too far to rest comfortably on the hoods, and end up locking your elbows, you'll have hand numbness, arm and shoulder issue.