The amount of thyroxine produced by the body is regulated by a complex set of mechanisms. When there is a high production of thyroid hormone, it is considered a state of hyperthyroidism. Hyperthyroidism can lead to emotional problems, hypermetabolic problems, and heart problems. In severe cases, it can lead to death. Thyroxine controls the body’s metabolism, but when the hormone is too high, hypermetabolism occurs, and although the person eats a lot, he or she still cannot stop the consumption of nutrients in the body. Problems like wasting, excessive sweating, and fever occur. After a long time, malnutrition occurs because glucose, protein and fat are excessively consumed. Thyrotoxicosis can occur with increased thyroxine, and some people can develop diarrhea caused by hyperactive bowel movements. Problems such as rapid or irregular heartbeat, more severe atrial fibrillation or even hyperthyroid heart disease that causes heart failure can occur. There is also a characteristic form of thyrotoxicosis that can present with proptosis. The more severe ones cause the eyelids to fail to close, which not only affects the appearance, but can also lead to damage to the cornea because it cannot be protected by the eyelids. High thyroid hormone, if not corrected, can also cause very serious diseases, including thyroid crisis, which is a fatal disease that is not easily treated. Therefore, the presence of high thyroxine requires standardized treatment.