There are many causes of dizziness after exertion, and the common causes are mainly the following: first, insufficient blood supply to the cerebral arteries, the heart’s oxygen consumption increases after strenuous exercise, which leads to insufficient blood supply to the brain, resulting in symptoms of dizziness, if it is a transient, generally do not need excessive treatment, usually pay attention to appropriate exercise can be; second, hypoglycemia, the disease is due to excessive exertion, blood sugar The second, hypoglycemia, the disease is due to overexertion, lowering the brain energy supply, resulting in dizziness, often accompanied by palpitations, pale, sweating, hunger and other symptoms, immediately eat to replenish sugar to relieve symptoms. Third, fatigue syndrome, the disease is characterized by chronic fatigue as the characteristic clinical manifestations, the above symptoms are more obvious after exertion, often accompanied by dizziness, limb weakness and other symptoms, improve the relevant physical examination is often no organic disease, through adequate rest and appropriate exercise can improve the symptoms.