What are some symptoms of an upper respiratory infection?

A runny nose and congestion are classic symptoms associated with upper respiratory infections, commonly known as the common cold or viral upper respiratory infections. These symptoms occur due to inflammation and increased mucus production in the nasal passages, which is a typical response to viral infections. The body's immune system reacts to fight off the infection, leading to these observable symptoms. This condition primarily affects the upper respiratory tract, including the nose and throat, which is why such symptoms are indicative of this type of infection.

While other symptoms like fever and dry cough may appear in some upper respiratory infections, they are also associated with lower respiratory issues or more severe infections. Shortness of breath and wheezing indicate a more severe respiratory condition, often involving the lungs, while chest pain and fatigue are not directly related to upper respiratory infections but can arise from other health issues or complications. Therefore, runny nose and congestion distinctly point to typical manifestations of an upper respiratory infection.