Here's something interesting. If any of us have an x-ray, it would most likely show arthritis (changes in the bones, usually from muscles pulling on them.) But, we don't all have pain! "Arthritis" is a diagnosis doctors use when they don't know why else you might have pain.
But, muscles and trigger points will cause pain in the
Because of the deep therapeutic work I've done as a massage professional, I have had pain in the base of my thumb many times. And, I've worked it out many times, too.
The culprit muscles are most often in the web of your thumb and on the thumb-side of your lower arm.
What to do?
You can use heat, ice or massage on your lower arm, if it's tender.For your thumb pain, pinch your web with your finger and thumb from your opposite hand. (So you are pinching the web from both sides.)
You will find tender areas. Hold those areas for 12 seconds. Take a break any time your treating fingers get tired. You don't want to wear them out. You don't have to do this all at one time, either. Work all around the base of your thumb and around to your index finger. Do the center of the web, too. Do this as often as you can.
Also, take care not to tilt your hand toward your baby finger. That strains the muscles on the thumb-side of your lower arm and wrist.
If you can't avoid that tilting motion at work, a wrist brace can help, but don't wear it too tightly. Or you may be able to figure out how to do the movement without tilting. Sometimes we just do things from habit not realizing that we can aggravate muscles in our carpal tunnel area or cause pain in the base of our thumb.