Feeling dizzy may be caused by stress, lack of sleep, insufficient blood supply to the brain and anemia. 1. Stress: when the patient’s mental stress is too great, this situation will cause the brain cells do not get enough rest, and in the long run may appear dizziness and not feel awake and other symptoms. 2. Lack of sleep: when patients suffer from insomnia, depression or anxiety, it will lead to difficulty in falling asleep, which may cause head function damage, and patients will experience symptoms such as dizziness and unconsciousness. 3. Insufficient blood supply to the brain: vertebral artery-type cervical spondylosis, internal carotid artery plaque, cerebral atherosclerosis and other diseases lead to the narrowing of the blood vessels supplying the vertebral artery, internal carotid artery and other blood vessels, and the insufficient supply of blood to the brain leads to the whole person to be blinded. 4. Anemia: due to the reduction of hemoglobin content, carrying oxygen content is reduced, the tissue oxygen supply is insufficient, resulting in dizziness and lack of strength, the whole person may have a feeling of blindness. The whole person may have other reasons, usually pay attention to appropriate rest, reduce the pressure of life, it is recommended to seek medical advice as soon as possible, under the guidance of a professional physician to clarify the cause of the disease, and give targeted treatment.