I have “Daumenknochenhautentzündung”.
“Thumb bone skin inflammation” sounds pretty impressive, but German is a whole lot cooler :). I think the Latin is periostitis but I may well be wrong.
I didn’t know that was even a thing until yesterday, I just knew my thumb hurt.
Apparently, all bones are covered with a very thin, very delicate layer of “skin” responsible for connecting them to the ligaments and nerves and blood supply and who knows what (ask someone medical). If you repeatedly bash a part of your body where the bone is close to the surface (like your shin, or your fingers) there’s not enough flesh to cushion the impact, and you run the risk of damaging the aforementioned boneskin (which presumeably has a fancy Latin name like periost).
According to the internet, this kind of damage is generally caused by running in the wrong shoes.
According to my doctor, it can also be caused by writing too much. The repeated pressure of holding a pen, when you aren’t used to it, is enough to disturb the boneskin. Seems there was a reason behind my year 2 teacher’s constant critisism of how tightly I held (and still hold) “writing implements”.
My thumb, the one that hurt when I wrote all those revision cards, is suffering from accute Daumenknochenhautentzündung. That basically means it really hurts and I shouldn’t use it for a week or so.