Standing for a long time dizziness, may be due to excessive fatigue, anemia, hypoglycemia and so on. 1. Excessive fatigue: standing for a long time dizziness, may be due to long-term standing position, and make the body overworked, resulting in insufficient blood supply to the brain and caused. 2. Anemia: If there is anemia, postural hypotension will occur after standing for a long time, so that the normal supply of oxygen and blood to the cranial part of the brain is affected, local ischemia, hypoxia, causing dizziness and dizziness symptoms. 3. Hypoglycemia: Standing for a long time dizziness may also be due to low blood sugar levels, may also be accompanied by black eyes, fainting and other symptoms. Dizziness after standing for a long time, need to actively consult the doctor, follow the doctor’s advice reasonable treatment.