After suffering from hyperthyroidism, there may be symptoms such as easy agitation, irritability and insomnia, palpitation, fatigue, fear of heat, excessive sweating, emaciation, excessive appetite, increased frequency of bowel movements or diarrhea, and scanty menstruation in women. Hyperthyroidism refers to thyrotoxicosis caused by excessive production of thyroid hormone by the thyroid gland itself, which may show symptoms of hypermetabolism and increased excitability of the sympathetic nervous system, such as agitation, restlessness and insomnia, palpitation, fatigue, fear of heat, excessive sweating, emaciation, hyperphagia, increased stool frequency or diarrhea. In addition, female patients may also experience scanty menstruation or amenorrhea, and male patients may experience impotence and loss of libido. When symptoms of hyperthyroidism appear, it is recommended to go to the hospital in time to avoid delaying the condition.