What Causes a Runny, Stuffy Nose?
A runny, stuffy nose is a prevalent symptom that often occurs as a result of viral infections. Airborne viruses primarily enter the body through the nose, making it a common entry point. Coronaviruses, as well as other viruses responsible for the common cold and RSV, are frequently the underlying causes, particularly during colder seasons. Additionally, allergies or bacterial sinusitis can also lead to nasal congestion and discharge, which may appear clear, white, or yellowish in color.
Headache
Headaches can be a common symptom of viral infections, and they can be caused by a variety of mechanisms. Often, viral infections that result in a fever can also lead to headaches. Dehydration and the production of interferon and other immune system molecules to combat the infection can also contribute to the development of headaches.
Specifically, infections with rhinoviruses, which are responsible for the common cold, can cause nasal and sinus congestion that may result in a headache. Additionally, more severe headaches can indicate viral infections that affect the brain and its membranes, such as encephalitis and meningitis.