There are many reasons for patients to get dizzy and dizzy. Many people are prone to these manifestations when they stay up late or have poor sleep quality, and they belong to brain nerve dysfunction. If the patient usually has low blood pressure, anemia, or weakness, he or she may also experience transient dizziness and blinding during the process of getting up after squatting, which is caused by a transient lack of blood supply to the brain. The dizziness and blinding of the eyes may also occur during a cold or fever. When the patient has a cold or fever, the toxins secreted by bacteria or viruses will cause some stimulation to the brain nerves, and the patient will have vasodilation and sweating during the fever, which will cause the blood to concentrate and lead to a decrease in the effective blood circulation, and the patient will also have dizziness, blinding and weakness.