The main causes of frequent sleepiness are the following: 1. fatigue syndrome, often caused by prolonged heavy physical or mental labor, but also weakness, lack of energy, sore limbs, patients should usually pay attention to rest, to achieve a combination of work and rest, and to maintain adequate sleep. 2. mental depression, the patient has a low mood, reduced interest in the surrounding things, the symptoms of severe patients have panic, chest tightness, shortness of breath, dizziness and other somatization symptoms. 3, Anemia, mostly caused by insufficient iron intake or chronic blood loss, mainly manifests as pallor, panic and weakness, dizziness, memory loss, etc. 4, hypothyroidism, mostly caused by thyroiditis or thyroid gland removal, mainly manifests as weakness, drowsiness, fear of cold, dizziness, bradycardia, etc., often sleepy and want to sleep. It is recommended to go to the relevant departments of the hospital for consultation.