I posted that my rt hand suddenly blew up at the joint between the thumb and wrist 2-3 weeks ago; it is arthritis with injury from shooting - especially 2 guns that are a tad long for my trigger reach. This causes the gun to shift slightly as you compensate and recoil goes directly against the base of the thumb bone driving it over and over again into the joint, hence bone fragments etc.
BE CAREFUL OF YOUR GUNS POSITION, MAKE SURE IT POINTS STRAIGHT FORWARD FROM THE MIDDLE OF THE "V" FORMED WHEN YOU PUT YOUR THUMB AND FOREFINGER STRAIGHT OUT.
REALLY watch any gun that has a too long trigger reach for you. Start wearing padded shooting gloves with good support around the thumb if you have one too long for your reach, and now.* And don't buy any gun unless you check it's trigger-reach carefully.
The condition I have is called Basal Joint Arthritis and is common to begin with. Shooters can easily get it, fact I was told about a large article concerning it recently in one of the gun magazines. Dunno which.
I have the same in my other hand too, but not as bad. Even shooting with that off-hand now causes pain except in .22. I haven't a .380, I may shoot someone's to try that off-hand. My handgun days may be over, which I feel very sad about. There is an operation that is often successful. I doubt they will do this right off the bat however. We shall see tomorrow.
Be careful, I don't want others to be in my position. (By the way, I am 65, been shooting just 6 years but I really liked it. I don't like it as well, but maybe I will have to move to long guns. I shot 45acp a lot, including a revolver which really was too big for me.)
* I had no symptoms of arthritis before 2 weeks ago, which often is the case with this condition. Pain is absent for awhile though the damage is happening. So, double careful you all.