The vagus nerve can cause dizziness or fainting when blood pressure drops suddenly. Learn why this happens, how it is called vasovagal syncope, and what it means for nervous system health.

An imbalance in any of the four areas above can be manifested as a headache. For example, a person suffering from COPD may experience frequent headaches as a result of poor oxygenation. Likewise, a person with diabetes will experience a headache when their blood sugar is out of a nominal range. Inflammation can impinge on nervous tissues resulting in over activation. At the same time inflammation can constrict blood vessels and restrict blood flow carrying the needed oxygen a