The main symptoms of hyperthyroidism include agitation, irritability, fever, excessive sweating, hyperphagia, emaciation, etc. The specific symptoms are related to the condition. Hyperthyroidism refers to hyperthyroidism, which is a condition in which the thyroid gland secretes too much thyroid hormone for various reasons, triggering an increase in the excitability and metabolic rate of the various systems and triggering a series of clinical symptoms. When hyperthyroidism leads to increased excitability of the nervous system, symptoms such as irritability, restlessness, insomnia, fear of heat and excessive sweating can occur. When it affects the cardiovascular system, panic, increased heart rate, increased pulse pressure difference, atrial fibrillation, etc. If left untreated for a long period of time, it can develop into thyroid heart disease. It can lead to enhanced metabolism in the digestive system, causing increased appetite, lethargy, diarrhea, and increased frequency of bowel movements. Hyperthyroidism can also be cyclic hypokalemia with periodic paralysis; hyperthyroidism can also present with progressive weakness and atrophy of the proximal muscles, predominantly the scapular and pelvic girdle muscle groups. Hyperthyroidism may also appear special clinical manifestations, such as protruding eyes, the patient may feel a foreign body sensation in the eyes, photophobia, tearing, vision loss, etc.; the appearance of lower limb anterior tibial mucous edema, in the lower limb tibial anterior 1/3 of the muscle tissue swelling can be seen; women can also lead to scanty menstruation. Hyperthyroidism can cause problems in many systems of the body, and the severity of symptoms is positively correlated with the degree of progression of the disease. If relevant clinical symptoms appear, it is recommended to seek medical treatment in a timely manner.