Insufficient thyroid secretion mainly causes symptoms of hypothyroidism, which is characterized by a state of low thyroid metabolism and low calories. Patients initially present with sluggish neurological reactions, and amnesia is a typical clinical symptom. The disease is insidious in its onset and often presents with weakness, sleepiness, and lack of interest in life. As the disease worsens over time, specific skin manifestations may occur, such as mucinous edema, coldness of the skin due to lack of heat, metabolic effects on the digestive system, loss of appetite, lack of gastrointestinal motility, constipation or diarrhea. It may also affect the cardiovascular system, including the decompensation of heart rhythm, chest tightness, shortness of breath, weakness and limb weakness. The effects on the nervous system are mostly apathy and unresponsiveness. Therefore, in case of insufficient thyroid secretion, it is best to go to a regular hospital for a detailed examination and improve the symptoms by supplementing with eugenol or thyroxine tablets.