3Why May a Hangover Cause a Fever?
Changes in the Immune System
Most symptoms of a hangover can be attributed to changes to the immune system after consuming alcohol. Scientists have found that the levels of cytokines in the body increase a few hours after drinking. These are signaling proteins that play a key role in the communication between the immune system and cells. The higher number of cytokines leads to inflammation, which may result in a fever. However, more research is still needed to learn more about the association between a hangover and a fever. [3]
