Hyperthyroidism is when a person has too much thyroid hormone. It is also called overactive thyroid. Symptoms of hyperthyroidism include a rapid heartbeat, tremors, weight loss, heat intolerance, excessive sweating, nervousness and/or agitation, increased bowel movements, fatigue, and decreased concentration. Treatment options include medication, radioactive iodine, surgery, Traditional Chinese Medicine, nutritional therapy, herbal therapies, homoeopathy, and acupuncture.