Fine trembling or shaking in the hands and fingers, especially noticeable during fine motor tasks.
Feeling excessively warm or sweaty, even in cool temperatures.
Paradoxically, some people with hyperthyroidism also experience fatigue or weakness due to the strain on the body.
Difficulty falling asleep or staying asleep, often due to heightened anxiety or rapid heartbeat.
Frequent bowel movements or diarrhea, sometimes with urgency.
Muscle weakness, especially in the thighs and upper arms.