Hyperthyroidism is a pathological condition with no “benefits”. If it is not treated in time, there will be many hazards, such as thyroid enlargement and compression of surrounding tissues, hyperthyroidism eye disease, thyrotoxic heart disease, thyroid crisis and so on. 1. Compression of peripheral tissues: In primary hyperthyroidism, the thyroid gland may be enlarged and compress the neighboring tissues, for example, compression of the trachea can cause dyspnea, choking and coughing, compression of the esophagus can cause swallowing difficulties, and compression of the jugular veins can lead to cephalo-facial edema and so on. 2. Hyperthyroidism eye disease: Hyperthyroidism may cause protruding eyes, which may be characterized by protruding eyeballs, foreign body sensation in the eyes, distension and pain in the eyeballs, photophobia, diplopia, and so on, which may lead to vision loss or even blindness in severe cases. 3. Thyrotoxic heart disease: long-term elevated levels of thyroid hormones can cause cardiotoxicity, inducing atrial fibrillation, heart failure and other cardiac diseases, which are prone to adverse effects. 4. Thyroid crisis: thyroid crisis is a form of acute exacerbation of hyperthyroidism, which is caused by a large amount of thyroid hormone entering the bloodstream in a short period of time, and the patient will have high fever, profuse sweating, tachycardia, irritability, delirium, and other hypermetabolic manifestations, and in severe cases, it can induce acute heart failure or even shock, and improper treatment can lead to the death of the patient. Hyperthyroidism is a common metabolic disease, will not bring benefits to the body, if not treated in time, will cause many complications, seriously affecting the normal life of the patient, and even endanger the patient’s life, it is recommended that the patient go to the hospital as soon as possible, under the guidance of a professional doctor to carry out the appropriate treatment.