Hyperthyroidism, short for hyperthyroidism, is a thyrotoxicosis caused by excessive production of thyroid hormones by the thyroid glands themselves. Its causes include diffuse toxic goiter (Graves’ disease), nodular toxic goiter, and autonomic hyperfunctioning adenoma of the thyroid gland. Early symptoms of hyperthyroidism mainly include: hyperphagia, lethargy, fear of heat, excessive sweating, palpitations, agitation, irritability, insomnia, fatigue, increased stool frequency or diarrhea, protruding eyes, enlarged thyroid gland, scanty menstruation in women, impotence or breast development in men. However, not all patients with hyperthyroidism will have the above-mentioned typical symptoms. Some patients may not have obvious symptoms at the early stage, and there are even a few elderly patients with insidious onset and atypical hypermetabolic symptoms, but on the contrary, they show weakness, dizziness, syncope, palpitations, anorexia, depression, drowsiness, nervousness or indifference, diarrhea, anorexia, and significant weight loss, which are called “indifferent hyperthyroidism “It is often overlooked or misdiagnosed in clinical practice. Therefore, the early symptoms of hyperthyroidism may not be typical, but if the above symptoms appear, we must pay attention to them and suggest patients to go to the hospital for formal examination in time for early diagnosis and treatment to avoid delaying the disease.