It Just Won’t Go Away: Reasons For a Lingering Cough

We’re used to coughing when we have a cold, but what about those coughs that seem to linger even after all other symptoms have disappeared? It turns out that what may seem like a nuisance can actually be the body’s innate intelligence at work. At the first sign of foreign invaders, coughing acts as a primary line of defense, expelling whatever virus or bacteria is trying to make its way into the system. During this time it’s especially helpful when coughing to cover your mouth, with your inner elbow if possible, to prevent the spread of illness. However, there may be other reasons for a cough that hangs on after a cold has run its course. To understand this we need to take a deeper look at the inner workings of the respiratory system. The respiratory tract is lined from nose to lungs with a thin layer of mucous, a primary function of which is to trap particles, from smoke to mold to viruses. This mucous is perpetually propelled upwards through the throat by small hairs called cilia. Eventually the mucous is unconsciously swallowed, and particles are destroyed by the acidic environment within the stomach. The issue arises when an infection damages cilia. It’s capable of growing back, but it may take 4-6 weeks for cilia to recover fully. Thus mucous builds up but isn’t able to move as freely as it normally does. In this case the body’s next best option is to use coughing as a mechanism to propel mucous outward. And so while it may be the case that a cold has already...
Source: Conversations with Dr Greene - Category: Child Development Authors: Tags: Dr. Greene's Blog Contagious Cough COVID-19 Related Virus Source Type: blogs