Head confusion, sleepiness may be due to mental stress or excessive fatigue, lack of sleep caused by lack of oxygen to the brain, is a normal physiological phenomenon. Usually, you should pay attention to regular work and rest, relax and do not stay up late. Usually pay attention to rest and sleep can be relieved. In addition to physiological factors, the following pathological factors are also common: 1, cerebrovascular disease: cerebral infarction, cerebral hemorrhage, subarachnoid hemorrhage and other cerebrovascular diseases may lead to insufficient blood supply to the cerebral arteries, which may suddenly appear or appear in the short term, easy to sleepy performance, mostly in the middle-aged and elderly; 2, cervical spondylosis: may cause insufficient blood supply to the vertebral basilar artery leading to lack of oxygen to the brain, the head confusion, sleepiness 3, sleep apnea syndrome: mostly seen in young obese patients, sleep apnea at night, the phenomenon of suffocating awake, waking up after the lack of oxygen to the brain is still in a state of fatigue, may appear in the daytime head confusion, headache, dizziness, sleepy performance; 4, hyperlipidemia: blood in a high-fat, high viscosity state may affect the brain blood flow slowed down, the symptoms of head confusion, sleepy; 5, Cognitive disorders: Alzheimer’s disease, Lewy body dementia and other diseases, the disease process is mostly slow, easy to appear the symptoms of head confusion, sleepy, mostly seen in the elderly; 6, depression: patients may have head confusion, sleepy, bad mood performance, reluctance to outdoor activities, reluctance to communicate with the people around the performance.