Hyperthyroidism is a condition that can make you feel shaky, anxious, and tired.
It happens when a gland in your neck, called the thyroid gland, makes too much thyroid hormone.
This hormone controls how the body uses and stores energy.
Some people with hyperthyroidism don't have symptoms, but symptoms can include:
- Anxiety, irritability, or trouble sleeping
- Sweating a lot
- Fast or uneven heartbeats
- Feeling tired
- Weight loss even when eating normally
- Frequent bowel movements
It can also cause swelling in the neck called a "goiter."
Untreated hyperthyroidism can cause a heart rhythm disorder called "atrial fibrillation," chest pain, and rarely, heart failure.
It can be treated with anti-thyroid and beta-blocker medicines, surgery, and radioactive iodine.