Stooping or Hunching Over Are you not standing up as straight as you used to? If you're resting and not doing anything, your hands are very still, whereas when you try to do something with your hands, such as writing or even holding a coffee cup, your hands will be tremoring. Do essential tremors travel in families? Additional symptoms may include head tremor e. However, it Left thumb trembles often be invisible Left thumb trembles the naked eye. Shaking can be normal after lots of exercise, if you are stressed or if you have been injured.