Normally, the basal metabolic rate is calculated as the sum of pulse rate plus pulse pressure minus 111, and is generally considered to be within the normal range of plus or minus 10% or 15% of this value. The basal metabolic rate refers to the energy metabolism of the body in its basal state. Of course, the basal metabolic rate is related to the body’s activity level and age, and it increases with meals and activity, so it should be calculated early in the morning when there is no activity going on. The basal metabolic rate changes when the body has hyperthyroidism or hypothyroidism. Hyperthyroidism causes a significant increase in the basal metabolic rate due to an increase in the basal metabolism. Hypothyroidism causes a decrease in the basal metabolic rate. When abnormal basal metabolic rate occurs, it is recommended to consult the endocrinology department of a regular hospital, which needs to take into account the patient’s clinical symptoms, thyroid hormone levels, etc. to determine whether there are endocrine system diseases.