What should you know about features of hyperthyroidism?

An overactive thyroid may cause a fast or irregular heartbeat, tremor, feeling anxious, difficulty sleeping, increased appetite, weight loss, muscle weakness, or frequent bowel movements and Diarrhoea. Some people notice Excessive Sweating, Heat Intolerance, or Night Sweats. Symptoms can build gradually and may be mistaken for stress, poor sleep, or changes in routine.

The thyroid affects many organs, so no single symptom confirms the condition. A clinician usually combines your history and examination with blood tests that assess thyroid hormone activity. Palpitations that are new, persistent, or associated with dizziness deserve medical review.

Make an appointment if several features persist, especially racing heart, unexplained weight change, tremor, heat intolerance, or bowel changes. Record when symptoms occur, your pulse if advised, medicines and supplements, and any history of thyroid disease. Do not start iodine or thyroid products without medical advice.

Treatment depends on the cause and may involve medicines, specialist care, or another approach chosen after testing. Limit triggers that clearly worsen palpitations, such as excess caffeine, until you have advice.

Seek urgent help for chest pain, severe breathlessness, fainting, marked confusion, a very fast or irregular heartbeat, or sudden severe worsening with fever. These signs can indicate a serious complication or another emergency and should not be attributed to anxiety alone.

Ask which thyroid tests you need, what may have caused the overactivity, whether your heart rate needs treatment, and how soon symptoms should improve. Ask whether your medicines, supplements, pregnancy plans, or other conditions change the safest treatment choice.