The phrase "hair of the dog" refers to consuming more alcohol the morning after drinking to alleviate hangover symptoms. Despite its widespread use, there is no scientific evidence to support the effectiveness of this practice. Alcohol is a depressant that disrupts the body's normal functions, and adding more alcohol to the system only prolongs its effects.
Consuming more alcohol can provide temporary relief from hangover symptoms, but it does not eliminate them and can lead to a cycle of alcohol dependence. Additionally, the practice can be dangerous, as it may mask more severe symptoms that require medical attention.