This is the result of over drinking and over fingering. After a long period of fingering the vagina, the fingers and wrist get sore and swollen. Should heal in 3-5 days.
Dude, I fingerbanged this chick so long last night I got fingerbangitis.
Violinists and players of other string instruments must keep their fingernails extremely short in order to play well. It is commonly referred to as "Violin/Violinist Fingernails"