3. Shaking
High levels of thyroid hormone can affect the way your muscles work. Also, since they have mental effects as well, the state of your mind can influence your muscular tone and your movements. Hyperactivity and nervousness can make you move a lot, tap your feet or fingers, and feel restless.
However, the effect on your movements can be even deeper than that, and reach unvoluntary levels. People with high thyroid hormone levels can experience a sort of tremor in some parts of their body. A tremor is constant shaking of our limbs or fingers that is caused by irregularities in your muscular tone and regulated by your neurovegetative system.
The places where tremors due to high thyroid hormone levels are most frequently found are hands and fingers. Tremors are rarely big or violent movements, they are often more like a fine trembling that seems a consequence of a nervous state more than a motor problem.