4. Runny Nose
A runny nose is a symptom of many conditions. It is characterized by mucus draining or dripping from the nostril. The mucus is a protective substance produced by the mucous membrane. This is a type of tissue lining the nasal cavity. The mucus moistens the air you breathe, and it acts as a barrier to keep dust, pollen, and bacteria out of your lungs. Your nose produces mucus every day, yet you probably don’t notice because it mixes with saliva and drips down the back of your throat.
Sometimes, irritation or inflammation in the nasal passage can lead to increased mucus production. When this happens, excess mucus can drain or drip from the nose. Symptoms are usually caused by allergic sensitivity to pollens from trees, grasses, or weeds, or to airborne mold spores. And to remedy the runny nose, a gentle saline nasal spray or drops may be used and make it easier to breathe. The saline solution will help soothe the mucous membranes inside the nose.