The lack of oxygen in the head when vomiting is considered to be related to insufficient blood volume, insufficient blood supply to the brain, atherosclerosis and other factors.
1. Insufficient blood volume: If the patient has anemia, he/she may have dizziness and headache due to insufficient blood volume in his/her body and lack of oxygen in his/her head when he/she vomits.
2. Insufficient cerebral blood supply: If the patient has narrowed cerebral blood vessels, he may not be able to transport oxygen to the brain in time when vomiting, and then there will be symptoms of dizziness and headache caused by lack of oxygen in the head.
3. Atherosclerosis: the same principle as cerebral vascular stenosis, patients in vomiting, may be due to atherosclerosis, resulting in transient oxygen deprivation of the brain, which in turn produces dizziness, headache, and even fainting phenomenon.
There are other reasons for the lack of oxygen in the head when vomiting, if necessary, you can go to the hospital, cooperate with the doctor to improve the relevant examination, to determine the cause and then do treatment and treatment.