Common symptoms of hyperthyroidism include rapid weight loss, insomnia, anxiety, irritability, palpitations, fast heartbeat, heat intolerance, sweating, tremors, diarrhea, depression, weakness, eye and vision changes, lighter or infrequent periods, and infertility. (verywellhealth.com)
For example, if you get symptoms of hyperthyroidism in the first phase, your treatment may include medicines to slow down the heart rate. (womenshealth.gov)
Scott experienced one of the less common symptoms of hyperthyroidism unique to men: gynecomastia, an enlargement of the breasts. (healthcentral.com)