Watch out for the following symptoms:4,17

  • Fast heart rate (often more than 100 beats per minute)
  • Irregular heart rhythm, predominantly in patients over 60 years of age
  • Nervousness and/or irritability
  • Weight loss without dietary changes
  • Prominent, staring eyes (typical for Graves’ disease)
  • Increased sensitivity to warm temperatures
  • Muscle weakness, especially of the upper arms and thighs
  • Increased sweating
  • Frequent bowel movements
  • Lighter or less frequent menstrual periods
  • Trembling hands
  • Rapid growing fingernails
  • Hair loss
  • Smooth and thin skin

Again, symptoms alone do not reliably tell whether you are hyperthyroid; physical examinations and blood tests are needed.

Causes of hyperthyroidism

Autoimmune thyroid disorder (Graves disease)17

Nodules or lumps (toxic nodular or multinodular goiter)17

An overactive thyroid by birth17

An overactive thyroid by viral infection17

Too much intake of thyroid hormone17