While I don't have any numb limbs, if you do after riding, you had better address it, because damage can be permanent. One of my fellow co-workers, like me, now-retired, had issues with his lower extremities, not from bike riding, he had an arterial narrowing in the femoral. When he became symptomatic, and it didn't relieve itself after several days, he went to his PMD (primary care physician) who upon evaluating him, said, "get to the hospital, immediately!"
He decided to go to a larger hospital father from where he's living (2+ hours) associated with U of Alabama-Birmingham, where a preliminary work-up said he had the arterial stenosis to be solved via surgery. Once they operated, they ended up going much-further in arterial replacement than they planned (24" instead of 6") and in the recuperative phase, he still was having issues. They did a balloon pump angiography, the same procedure they may do to attempt to restore better cardiac artery flow, and gradually, his lingering symptoms have mostly-subsided. While this is not specifically a nervous system problem, the side-effects were definitely related to the nervous system.
When he was speaking with the surgeon, after the results came in the surgeon told him, "we can probably save your leg." After the operation, and with his lack of progress, there was a question of losing some toes due-to circulatory issues, but another procedure (above) seems to have allowed him to not face the loss of toes, for now. The surgeons operated upon him for 12+ hours. He is very thankful for their work.
If your body is telling you something, heed the message.
