Patients lying in bed for a long time appear dizzy, mainly consider the following aspects of the cause: First, to consider is caused by insufficient blood supply to the brain, especially at night when sleeping, the patient’s physiological condition of blood flow will slow down, especially the blood is in a high-fat, high-viscosity state, patients are more likely to occur ischemic cerebrovascular disease, so that lying in bed for a long time patients will have the performance of insufficient blood supply to the brain, it will The second aspect, lying in bed for a long time dizziness, may also be caused by upright hypotension, mainly because the patient’s usual blood pressure may be low, lying in bed for a long time, suddenly when standing up causes not enough blood supply to the brain, the patient will appear a transient dizziness; third, lying in bed for a long time, if it is the case of insufficient food, easy to appear the reaction of hypoglycemia and The third aspect is that if you lie in bed for a long time, if you do not have enough food, you may have a low blood sugar reaction and become dizzy and lightheaded.