A viral infection can refer to one of many different conditions. They all have something in common: a virus causes them. Some of the most common viruses include the influenza virus and cold virus, which infect millions of people annually. Viral infections can affect different parts of the body. For this reason, symptoms can vary tremendously and can range from mild to life-threatening. Some of the most common symptoms include digestive system and respiratory symptom issues. Find out the top ten symptoms of viral infections.

1. Fever

Developing a fever is often the most common symptom of a viral infection. A fever is the body’s natural way of responding to a virus: by heating up, it attempts to destroy the infection as well as the virus that caused it. In most cases, fevers are mild to moderate and don’t need extra treatment besides pain medication and bed rest. If a fever becomes serious, medical attention may be necessary. A persistent high fever or a fever that doesn’t go away after a few days are signs that the infection may be more serious.