[COLOR= #0000ff]Hi, Pennington, and welcome to the forums![/COLOR]
[COLOR= #0000ff]I'm new to the forums, relatively, AND new to biking, lol, so I don't have an idea what might be causing your pain, biking-wise.[/COLOR]
[COLOR= #0000ff]BUT. If you're doing everything the same as you always have, biking, then something else could be causing the pain and you might not be connecting the pain to the right cause. That pain sounds very similar to carpal-tunnel syndrome pain. I typed in the medical field for a living for 30 years and never had it -- but when I started using the computer all the time, using my mouse a lot, I developed it! The interesting thing is that it usually didn't hurt when I was actually using the mouse; it would start hurting later, when I wasn't doing anything necessarily taxing the hand, and I would wonder what I had done. That's because the activity starts the inflammatory process, which can take an hour or more to build up enough to cause the pain. So if you've begun some other new activity recently that uses that hand, that could be the culprit. [/COLOR]
[COLOR= #0000ff]On the other hand, if it is indeed that you're putting too much pressure on your right hand after 8 years and don't know why you're doing it, some investigation is in order. If you're not deliberately biking any differently than you ever have, then it's something you're not aware that you're doing differently. The spine is a very interesting piece of work, because the nerves in it connect to nearly everything in the body in some way or another. If my spine is out of whack or tense in a certain area, my KNEE hurts in a specific spot. Weird, but true. I went through several years of specialists finding nothing mechanically wrong with my knee, trying to figure out where the knee pain was coming from. Then I went to a chiropractor because my neck was stiff. He fixed that, then examined the rest of my spine and said -- with no input from me -- "Have you been having knee pain? Because this can cause it." I nearly fell off the exam table! He worked on my back, and the knee pain gradually went away. Now when the knee hurts I go to him, he works on my spine, and the knee pain resolves. Really cool.[/COLOR]
[COLOR= #0000ff]The reason I'm bringing this up, of course, is that you said you knew you were putting too much pressure on the right side, but didn't know why. If your spine or your neck is out of alignment a little, it could cause you to lean slightly in one direction or to twist your torso a little, without your realizing it, to take pressure off the vertebra that is being crowded. So you might look into that.[/COLOR]
[COLOR= #0000ff]Just my 2 cents' worth, since I don't know much about bikes, lol. Hope you find your answer.[/COLOR]