Thyrotoxicosis may have symptoms such as fatigue, palpitations, shortness of breath, fear of heat and excessive sweating. Thyrotoxicosis refers to a clinical syndrome in which the secretion of thyroid hormone is increased due to a variety of reasons, causing hypermetabolism of the body and accompanied by abnormal symptoms of multiple systems such as neurological and cardiovascular. First of all, due to the high level of thyroid hormone in the patient’s body, it will lead to the continuous excitement of sympathetic nerves and the acceleration of the body’s metabolic rate, which will lead to symptoms of hypermetabolism such as fatigue, increase in appetite, weight loss, fear of heat and excessive sweating. In addition to the above symptoms, patients usually experience abnormal neurological symptoms such as nervousness and anxiety, insomnia and restlessness, abnormal cardiovascular symptoms such as palpitations and shortness of breath, tachycardia, and elevated blood pressure, and abnormal digestive symptoms such as diarrhea and increased frequency of bowel movements. The clinical symptoms of thyrotoxicosis are many and are not the same in different patients, but they are usually characterized by hypermetabolic symptoms such as fatigue and weakness, hyper appetite, and weight loss. If the above symptoms occur recently, it is recommended to consult a doctor in time for a clear diagnosis and timely treatment under the doctor’s guidance.