As an expert sommelier and brewer, I can provide some insights into the question of whether a hangover can cause a fever. It is important to note that while it is possible, it is a very rare occurrence. Hangovers are typically characterized by a range of symptoms, including headache and muscle aches, exhaustion, nausea, sensitivity to light and sound, and dehydration.
In my personal experience, I have encountered numerous hangovers, both from my own experiences and from observing others. While I have witnessed and experienced a wide range of symptoms, I have rarely come across cases where a fever was present. It is more common to experience symptoms such as a pounding headache, body aches, and extreme fatigue.
The main reason for this is that a hangover is primarily caused by the toxic byproducts of alcohol metabolism, dehydration, and inflammation in the body. These factors can lead to the symptoms commonly associated with a hangover, but they do not typically cause a fever.
However, it is worth noting that excessive alcohol consumption can weaken the immune system, making individuals more susceptible to infections and illnesses. In some cases, a hangover may coincide with an existing illness or infection that could cause a fever. For example, if someone already has a cold or flu, the combination of excessive alcohol consumption and the illness could potentially result in a fever.
It is also possible for certain individuals to have an adverse reaction to alcohol, leading to a fever-like response. Some people may have an intolerance or allergy to certain ingredients in alcoholic beverages, such as grains, yeast, or sulfites. These reactions can vary from mild to severe, and in rare cases, may include symptoms such as a fever.
While it is possible for a hangover to cause a fever, it is a very uncommon occurrence. The primary symptoms of a hangover typically include headache, muscle aches, exhaustion, and dehydration. If someone experiences a fever in conjunction with a hangover, it is advisable to seek medical attention to rule out any underlying illnesses or allergic reactions.