What causes dizziness and nausea after running?

Dizziness, nausea and vomiting after running may be caused by low blood sugar, lack of oxygen to the brain and insufficient blood supply to the brain.
1. Hypoglycemia: When running, a lot of energy will be consumed, which will easily cause hypoglycemia and insufficient supply of energy to the brain, so there may be dizziness, nausea and vomiting after running.
2. Brain hypoxia: when running, the body’s oxygen consumption will increase, and brain hypoxia may occur, so there will be dizziness, nausea and vomiting after running, which is a normal physiological phenomenon, and usually after resting, the brain restores oxygen supply, and the symptoms will be relieved.
3. Insufficient cerebral blood supply: After running, the peripheral blood vessels will expand, and a large amount of blood will be distributed to the periphery of the body, which will lead to insufficient cerebral blood supply, so there may be dizziness, nausea and vomiting after running, and in severe cases, there may be sensory impairment of the limbs, and motor dysfunction and other manifestations.
Dizziness, nausea, vomiting after running may also be caused by other reasons, if the symptoms are serious and have not been relieved, it is recommended to go to a regular hospital in time, a clear diagnosis, and follow the doctor’s instructions for treatment.