What should you know about stress induced hyperthyroidism?

Stress does not usually cause hyperthyroidism by itself, but it can amplify symptoms of an overactive thyroid and make them harder to notice or manage. Hyperthyroidism happens when the thyroid releases too much thyroid hormone. Anxiety, poor sleep, sweating, a racing or irregular heartbeat, heat intolerance and diarrhoea can overlap with stress symptoms, so testing is needed to tell them apart.

Emotional or physical strain may make an existing thyroid problem feel more intense, especially when sleep is disrupted. It does not prove that stress caused the thyroid disorder. Other causes can include an autoimmune thyroid condition, thyroid inflammation or too much thyroid medication. A clinician may review your symptoms, medicines and medical history, examine your neck and order thyroid blood tests. Read more about [Hyperthyroidism](/conditions/hyperthyroidism/).

Symptoms can vary. You may notice [Feeling Anxious](/symptoms/feeling-anxious/), [Difficulty Sleeping](/symptoms/difficulty-sleeping/), [Excessive Sweating](/symptoms/excessive-sweating/), [Heat Intolerance](/symptoms/heat-intolerance/), [Palpitations](/symptoms/palpitations/) or loose stools. These symptoms have several possible explanations, so avoid diagnosing yourself from one symptom.

Arrange a medical appointment if symptoms are new, persistent or recurring. Bring a list of medicines and supplements, including thyroid treatment, and note when symptoms began, what makes them worse and whether your pulse feels fast or irregular. Do not start, stop or change thyroid medicine without medical advice. While waiting for assessment, prioritise sleep, drink enough fluids, limit stimulants such as caffeine if they worsen palpitations, and use calming routines that suit you. Stress-management can ease distress, but it cannot replace thyroid evaluation.

Seek emergency help for chest pain, severe breathlessness, fainting, confusion, a very fast or irregular heartbeat, or marked weakness with fever. These may signal a serious complication requiring immediate treatment. Also seek prompt medical advice if vomiting, diarrhoea or sweating is causing dehydration, or if symptoms are rapidly worsening.

Ask: Could my symptoms be related to thyroid hormone levels? Which blood tests are appropriate? Could any medicine or supplement be contributing? What symptoms should prompt urgent help? If hyperthyroidism is confirmed, how will treatment and follow-up be planned?