Can stress cause hyperthyroidism?

Stress can increase adrenaline and disturb sleep, appetite and bowel habits. Those changes may feel similar to symptoms of an overactive thyroid, such as palpitations, sweating, feeling anxious or difficulty sleeping. Hyperthyroidism itself is caused by excess thyroid hormone, commonly because the immune system stimulates the gland, a thyroid inflammation process, or hormone-producing thyroid tissue. Stress may make symptoms more noticeable, but it should not be used to explain away abnormal thyroid blood tests. Read about [Hyperthyroidism](/conditions/hyperthyroidism/).

If symptoms began during a stressful period, arrange an assessment rather than assuming stress is responsible. Mention recent illness, pregnancy, family thyroid history, medicines, supplements and any neck swelling. Thyroid-function blood tests help distinguish hormone excess from a stress response; further tests may be needed if results are abnormal. Sleep routines, gentle activity and reducing stimulant drinks may ease stress-related sensations, but they do not correct thyroid overactivity. Continue any prescribed treatment unless your clinician tells you otherwise.

Seek emergency care for chest pain, fainting, severe breathlessness, confusion, severe weakness or a very fast irregular heartbeat. Urgent review is also needed when symptoms escalate quickly, especially with fever, vomiting or inability to drink. For recurring but stable symptoms, book a routine appointment and bring a list of triggers and treatments.

Ask how stress symptoms differ from thyroid overactivity, which tests are needed, and whether any medicine or supplement could be contributing. Ask for a clear plan covering symptom relief, repeat testing and warning signs.