Graves’ disease, also known as thyrotoxicosis, is the main clinical cause of hyperthyroidism, so the clinical manifestations of Graves’ disease are mainly hyperthyroid symptoms. For example, in the cardiovascular system, patients may experience tachycardia or even atrial fibrillation, and in the digestive system, patients may experience an increase in the number of stools and diarrhea. The clinical symptoms of hyperthyroidism may include hyperphagia, easy hunger and weight loss, and the patient may experience changes in temperament such as fear of heat, excessive sweating and irritability.