The symptoms of dizziness and drowsiness are considered in many ways and need to be checked and ruled out one by one: 1. Whether there is hypertension, patients who have hypertension but are unaware of it often have complaints of dizziness, lightheadedness, head swelling and drowsiness. Need to measure blood pressure several times in a quiet state to see if there is greater than 140/90mmHg, consistent with the diagnosis of hypertension to timely intervention. 2, the presence of cerebral blood supply deficiency, which is a common cause of dizziness and drowsiness, need to visit the hospital to check the neck vascular ultrasound, transcranial Doppler to exclude. 3, the presence of high blood sugar, high blood lipids, diabetes mellitus and hyperlipidemia, will also appear dizziness and drowsiness, to the 4, if cardiac insufficiency, pulmonary insufficiency, lack of oxygen in the body will also dizziness, drowsiness, but more underlying diseases of the heart and lungs. 5, cerebrovascular disease also need to be considered and excluded.