Always head-blindness is common in the following conditions: First, functional disorders. Clinical studies and surveys have shown that patients with anxiety and depression as well as patients with plant nerve dysfunction will have head-blindness and dizziness, or even simply show head-blindness, which can be accompanied by anxiety, distraction, insomnia, sweating, fatigue, and dreaminess. Relevant examinations such as head CT, electrocardiogram and chest X-ray examination are not abnormal. Second, cervical spine disease, easy to compress the occipital nerve, causing scalp wood, swelling, pain, resulting in a feeling of head dizziness, cervical magnetic resonance examination, can be clearly diagnosed. Third, abnormal blood pressure, whether hypertension or hypotension, will lead to dizziness, dizziness, headache, measurement of blood pressure can be clear, and will improve after adjusting blood pressure. Fourth, sleep apnea syndrome, due to snoring and apnea at night, resulting in lack of oxygen to the brain, there will be a dizzy feeling during the day, which can be accompanied by dozing and memory loss.