1. Feeling Tired vs. Feeling Jittery
The hormone released by the thyroid controls energy levels and signals cells when it is time to wake up or to sleep. The most common symptom of hypothyroidism is feeling tired and worn out, no matter how much you rest, because you don’t have enough hormone to properly signal cells. You may also experience low motivation and mental exhaustion on top of physical sluggishness.
On the flip side, people with too much thyroid hormone feel nervous and jittery. You may not be able to stay seated or to focus on any one task. That’s because your cells are flooded with the message to go-go-go. This can also manifest in anxiety, tremors, or difficulty sleeping.