Someone with hyperthyroidism — an over-active thyroid gland — may experience some or all of the following symptoms. The same caution about symptoms of hypothyroidism applies here; these symptoms alone don't confirm a diagnosis. Only blood tests can do this.
Higher body temperature and intolerance to heat
Weight loss
Weakness
Enlarged thyroid
Warm, moist skin
Rapid pulse
Tremor of the fingers and tongue
Nervousness
Difficulty sleeping
Rapid mood changes
Decreased menstrual flow
More frequent bowel movements
Changes to the eyes that make it appear as if you're staring
