Headache, drowsiness, and fatigue can occur if the person has done a lot of exercise training in the first two days, or if he/she has a strong labor force outdoors, or if he/she has walked in the desert, or if he/she has paid too much. If headache, drowsiness and fatigue occur without the above mentioned triggers, especially for the elderly, we should pay attention to check whether there are other pathological changes, such as hypertension, cerebrovascular stroke, lacunar cerebral infarction can produce the above mentioned symptoms, and there are also some neck cervical spondylosis that can cause headache, dizziness, drowsiness, fatigue and so on. If you have unexplained drowsiness and fatigue, you should check the central nervous system, hypertension, cervical spondylosis, diabetes, and so on. Physiologic causes should be considered only after organic lesions are removed, and electrolytes, head CT, and biochemistry should be examined.