5. Sore Throat
The flu can cause a lot of things to happen in the body, and the body may react in many different ways. A sore throat can be caused by the body trying to get rid of the virus. It produces mucus to help flush the virus from the system. As the mucus moves through the body and travels down the throat, it can cause the throat to become inflamed and sore.
Coughing, dehydration, fever, and other symptoms that are common with the flu can also cause a sore throat. Drinking warm fluid can help soothe the throat. Many people also find relief from throat sprays and lozenges that help coat the throat and ease the pain.
Some people experience a sore throat accompanied by a cough and drainage, and others have no cough. The sore throat can last longer than other symptoms and may also be one of the first symptoms to show up.