Why is my nose runny when the weather is cold

The reason why your nose runs when the weather is cold is primarily due to a process called rhinitis. When the weather becomes chilly, it often results in changes in air pressure and temperature, which can irritate the mucous membranes inside your nose. Your nose is a complex system that regulates the flow of air into your lungs. When the air temperature is lower, your body responds by producing more mucus to help warm up the air and trap any dust or particles that may be present. This increase in mucus production can lead to a runny nose. Furthermore, in colder weather conditions, blood vessels near the surface of your skin tend to contract, causing more blood to flow to them in order to retain heat. This process can also affect the blood vessels in your nose, resulting in increased mucus production and nasal discharge. In addition, other factors like allergies, viral infections, or other environmental factors can also contribute to a runny nose when the weather is cold. In summary, a runny nose when the weather is cold is often a result of changes in air pressure and temperature, which can irritate the mucous membranes in your nose and lead to increased mucus production. However, other factors may also play a role. If you experience frequent runny noses or other symptoms that are concerning to you, it is recommended to consult a healthcare professional for further evaluation and advice.