The common causes of sleepiness include the following: 1. If you are drowsy and sleepy, accompanied by dizziness, palpitations, pallor, etc., you should be alert to the presence of anemia, which can be clarified by perfecting routine blood tests. 2. If the above symptoms occur in young and middle-aged women, they should be alerted to the presence of hypothyroidism, and the diagnosis can be clarified by perfecting the thyroid function test. 3, whether there is hypertension, diabetes, dyslipidemia and other underlying diseases, if the combination of the above underlying diseases, it may be caused by cerebral arteriosclerosis caused by the lack of blood supply to the brain, or blood thickening caused by sleepiness, and need to carry out blood pressure, blood sugar 4. If there is no underlying disease, no organic lesion, it is considered to be related to the subhealth state, so it is necessary to regulate the diet and work habits, reasonable diet, proper rest, adjust the mentality, and pay attention to reduce work stress.