I was doing the finger pricking and testing several times a day for three straight months and didn't ever get a sugar value above 108. I don't think that's it. Anyway, I drink black coffee.
I know why it started with my thumbs. I used to use a
planishing hammer in my autobody shop. The vibrations pretty much destroyed my thumb joints at the wrist. The fingers and wrists just followed. I've been "testing" various RA drugs since around 2016. I've tried, I think, three self-injecting drugs. I used to alternate thighs every morning for about three years. None of it did much good for very long. My body kept developing antibodies for each drug and the effectiveness just decreased until the next drug.
I've been on pills, shots and infusions. Each one more powerful than the last. I start a new infusion drug on the 25th. It's given two weeks apart then again in six months so it must be really strong. We'll see.