Fiddler's neck.

@article{Moreno1997FiddlersN,
  title={Fiddler's neck.},
  author={Jose Castillo Moreno and I M Gata and Bego{\~n}a Garc{\'i}a-Bravo and Francisco Miguel Camacho},
  journal={American journal of contact dermatitis : official journal of the American Contact Dermatitis Society},
  year={1997},
  volume={8 1},
  pages={39-42}
}
The dermatologic pathological condition of musicians is a rare medical problem. We would like to draw attention to what is called "Fiddler's neck," a process that is peculiar to violin, viola, or cello players and that may be caused by two different mechanisms: contact allergic reaction or a mechanical action.