Symptoms include:

  • muscle spasms
  • fingers curling, clenching, shaking, or sticking in a position
  • gripping writing implements too hard
  • extension of the finger during writing making the writing implement difficult to hold
  • unusual postures of the wrist or elbow
  • reduced precision when playing instruments
  • tremor (more unusual)

Stress and anxiety are known to exacerbate the symptoms.