Being sleepy all the time during the day is not necessarily a kidney deficiency. In Chinese medicine, kidney deficiency can be divided into kidney yin deficiency, kidney yang deficiency and kidney yin and yang deficiency. Among them, patients with kidney yang deficiency and kidney yin and yang deficiency will show symptoms such as fatigue, decreased vitality, listlessness and sleepiness, which can be accompanied by coldness, soreness and weakness of the waist and knees. Therefore, it is not possible to identify a patient as having kidney deficiency just by the single manifestation of being sleepy during the day, but a comprehensive analysis is needed. There are many causes of daytime sleepiness, generally divided into two categories: physiological and pathological: 1. Physiological: young people are always sleepy during the day, mostly due to staying up late at night, overthinking and other behaviors, resulting in sleep deprivation at night and daytime sleepiness. In the case of obese people or those who dream more, the continuity of sleep at night is broken, resulting in insufficient effective sleep time and poor mental performance during the day. For the elderly or nerve-sensitive people, sleep lighter, there is a slight movement can wake up, coupled with the surrounding environment is not quiet enough, can also cause daytime sleepiness all the time; 2, pathological: cerebral insufficiency of blood supply patients, such as cerebral atherosclerosis, cerebral hemorrhage and other patients, can be due to disease causes intracranial blood supply, oxygen supply is insufficient, so that their own physical strength, mental confusion, fatigue and weakness, drowsiness and other performance. In addition to the above diseases, anemia, heart disease, liver disease, hypothyroidism, diabetes, etc. may lead to poor mental status, drowsiness, and other manifestations of the patient, resulting in daytime sleepiness. Therefore, daytime sleepiness is not necessarily due to kidney deficiency, it is recommended to seek medical examination early to avoid delaying the best time to treat the disease. At the same time, pay attention to adjusting the daily routine, develop a good habit of early to bed and early to rise, avoid thinking too much, etc.