A variety of diseases can lead to headache, dizziness and drowsiness.1. If the patient has night sleep disorder, such as insomnia, early awakening, dreaming, etc., the next day the patient may have headache, dizziness and drowsiness as a result of the symptoms. If the patient’s sleep disorder can be improved, the symptoms of dizziness and headache will disappear.2. Patients suffering from depression can usually show persistent dizziness and lightheadedness, and at the same time, the patient will also be accompanied by low mood, slow reaction, slow thinking and other symptoms.3. People with nocturnal sleep apnea syndrome can be caused by snoring and lack of oxygen during the night, leading to dizziness, lightheadedness and drowsiness the next day.4. People of advanced age with severe atherosclerosis can also be affected by dizziness, lightheadedness and drowsiness. Severe atherosclerosis in the elderly, due to its slow cerebral blood flow, blood supply and oxygen supply is insufficient, can also be manifested as headache, dizziness, as well as drowsiness symptoms.