Lying for a long time up dizziness, blackness in front of the eyes is easy to stand unstable and fall injury occurs. Lie for a long time up dizziness, black in front of the eyes may be due to overexertion, but also may be related to these diseases: 1, postural hypotension: sudden change of position may make postural hypotension patients due to insufficient blood supply to the brain dizziness, black in front of the eyes symptoms, it is recommended that the usual change of position should slow down the action, so that the body has a process of adaptation; 2, anemia: anemia patients in changing position also Will occur dizziness and other symptoms, anemia patients in daily life should pay more attention to nutritional intake, you can eat some gum, angelica, red dates, etc.; 3, hypoglycemia: when the blood sugar in the body is lower than the normal value, lying for a long time to stand up may have dizziness symptoms, this is because of low blood sugar when the brain’s energy source is not enough, thus causing brain function is blocked, triggering dizziness, blackness. It is recommended that hypoglycemic patients consume sugary foods in moderation on a regular basis, and if the symptoms are serious, they can go to the hospital for intravenous injection of glucose to relieve the symptoms; 4. Or physical therapy, avoid prolonged head down or head up, increasing the burden on the cervical spine; 5, cerebrovascular disease: such as cerebral infarction, intracranial aneurysm and other cerebrovascular diseases can cause dizziness due to changes in intracranial structure or vascular malformation and other reasons that lead to insufficient blood supply to the brain and oxygen supply to the brain, especially when the patient’s position suddenly changes this symptom. There are many reasons that can cause dizziness and blackness in front of the eyes after lying down for a long time, and it is recommended to go to the hospital to identify the cause in order to develop an accurate and effective treatment plan.