Hyperthyroidism is the condition in which the body has too much thyroid hormone. It might seem like too much would be a blessing for those who suffer from too little, but it is not.
Hyperthyroidism can cause you to feel overstimulated in general. If you drink coffee, imagine how you’d feel if you downed two full pots of it at once! You can imagine that you might be anxious and jittery and that your heart might be racing.
Many find it odd to learn that too much thyroid hormone can feel just like too little. Several classic hyperthyroid symptoms like fatigue, weight gain, and hair loss can also be caused by too much!
How can this be possible? It turns out that when you have too much thyroid, your body blocks it, and you can feel like there is too little. This same issue can even show up on blood tests. When your TSH is below range, it means your body wants less thyroid hormone. Sometimes it can also eliminate T3 and T4 more quickly, causing them to be low. People are often mystified when both the TSH and T3 are low, but this is one of the most common reasons.