What is active thyroid?

Active thyroid also known as hyperthyroidism, occurs when your thyroid gland makes too much thyroid hormone. Hyperthyroidism speeds up your body's metabolism. This hormone increase causes a variety of signs and symptoms including:

- Weight loss despite normal or increased appetite

- Rapid or irregular heartbeat

- Increased sweat

- Sensitivity to heat

- Nervousness or anxiousness

- Difficulty sleeping

- Fatigue, muscle weakness

- Changes in menstrual cycles

- Frequent bowel movements

- Goiter: an enlarged thyroid gland