Dizziness and nausea after running may be caused by insufficient oxygen supply to the brain, insufficient blood supply to the brain or low blood sugar. In general, it is recommended that you do not stop exercising suddenly after the appearance of this symptom, you can relieve the symptoms of dizziness and nausea by deep breathing and eating foods with high sugar content in time, if the symptoms do not relieve or continue to worsen it is recommended to seek medical attention in time. Common methods of relief are the following: 1, brain oxygenation, cerebral blood supply deficiency: when the amount of exercise or exercise for too long, the body can not adapt will lead to insufficient blood supply to the brain, causing a lack of oxygen. When this happens, it is recommended not to sit down immediately or suddenly stop running, you can continue to jog or walk slowly for a short time and breathe deeply, so that the body gradually adapt before sitting down to rest. If the lack of oxygen is serious, you can also inhale a small amount of oxygen to relieve the symptoms of dizziness and nausea; 2, hypoglycemia: exercise may consume a large amount of sugar in the body, causing hypoglycemia, often manifested as dizziness and nausea. You can eat some food or drink with high sugar content in time to replenish blood sugar, so that hypoglycemia is relieved, thus reducing the symptoms of dizziness and nausea. It is recommended to enhance physical fitness in general, prepare for exercise, and increase the amount of exercise gradually. If overload exercise for a long time, there may be a risk of inducing acute cardiovascular disease.