Professional diseases

Do people who knit-crochet-stitch professionally have any professional diseases? It seems I have developed one, after weeks of knitting cotton yarn with thin thin thin needles, my left hands smallest finger doesn't stop hurting. I think it was because I had to knit tighter than usually and I spent hours a day knitting. But hey, it's ready:








Yarn: Cotone Cablè 5. 100% cotton, 50 gr = 215 m
Needles: 2-2,5 mm
Spent: Red 4, yellow 1/5, orange 2/3 skeins.
Pattern: Mani di fata, june 2005