Dizziness may be caused by a lack of vitamin B12, but most dizziness is not caused by a lack of vitamins, but may also be caused by hypoglycemia, cervical spondylosis and high blood pressure and other diseases. 1. Vitamin B12: Vitamin B12 is involved in the metabolism of the human nervous system and hematopoietic function, if the body lacks vitamin b12, it will cause anemia, or nerve dysfunction, which will lead to dizziness, pallor, fatigue and lack of energy and other symptoms of anemia. 2. Hypoglycemia: When hypoglycemia occurs in the human body, the glucose in the blood is not enough to supply energy for the important organs, resulting in symptoms of ischemia and hypoxia. The neurological symptoms are dizziness and, in severe cases, shock. 3. Cervical spondylosis: patients with cervical spine hyperplasia or herniated discs may lead to compression of the cervical vertebral basilar artery, resulting in insufficient blood supply to the brain, thus causing dizziness. 4. Hypertension: When blood pressure rises significantly in hypertensive patients, dizziness, head swelling, headache and other symptoms will be accompanied. It is recommended that patients with symptoms of dizziness go to the hospital in a timely manner, under the guidance of the doctor to clarify the cause of the disease, targeted treatment, not blindly use their own medication, so as not to cause adverse consequences.