What should you know about overt hyperthyroidism?

Thyroid hormone influences heart rate, temperature control, digestion, muscles, and energy use. When levels are too high, you may feel hot, sweat more, lose weight without trying, have diarrhoea, tremble, feel restless, or struggle to sleep. Palpitations can feel like pounding, racing, or skipped beats.

Symptoms do not identify the cause on their own. Graves' disease, thyroid inflammation, thyroid nodules, medicines, and excess iodine are among the possibilities a clinician may consider. Blood tests usually help confirm thyroid activity, while further assessment looks for the underlying cause and effects on the heart and bones.

Arrange a medical appointment for persistent symptoms or a suspected overactive thyroid. Bring a list of medicines, supplements, and recent illness, and mention pregnancy or plans for pregnancy. Until assessed, avoid taking extra thyroid or iodine products unless prescribed, and replace fluids if sweating or diarrhoea is making you thirsty.

Treatment may involve medicine to reduce hormone production, medicine to ease selected symptoms, radioactive iodine, or surgery, depending on the cause and your circumstances. Follow monitoring instructions because treatment can shift thyroid activity in the other direction.

Seek emergency care for chest pain, fainting, severe breathlessness, confusion, extreme agitation, or a very fast or irregular heartbeat. Fever with severe worsening, vomiting, or marked weakness in someone with hyperthyroidism also needs urgent assessment.

Which thyroid tests do I need, and what might be causing the overactivity? Are my palpitations or blood pressure concerning? Which medicines should I avoid? How will treatment be monitored, and what symptoms should trigger urgent advice?