13 Signs and Symptoms of Excessive Thyroid Function

By Alan L. Rubin

Part of Thyroid For Dummies Cheat Sheet

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