The first and most common cause of dizziness is chronic cerebral insufficiency of blood supply, which is characterized by dizziness, a feeling of not being awake or a feeling of tightness in the head. Benign positional vertigo patients may also experience dizziness, but the dizziness is paroxysmal, lasts less than a minute, and can recur, with the head position and body position changes and dizziness symptoms. Systemic diseases can also lead to dizziness, such as anemia, when hemoglobin decreases, the amount of oxygen carried by hemoglobin naturally decreases, resulting in lack of oxygen to the brain and causing dizziness. Kidney dysfunction or liver dysfunction can also cause dizziness. Patients with hypothyroidism will experience symptoms such as lack of concentration, fear of cold and dizziness due to low metabolism, and dizziness can also be caused by abnormal blood pressure.