Apparently lots of people susceptible to catching “colds” also have acid reflux. The nasal congestion, mucus, etc cause this to flair up and the lingering cough may be a sign of the acid reflux acting up. Taking OTC medications — such as Nexium, Prevacid and Prilosec — can help. It did for me, even though I really didn’t have other “heartburn” symptoms. Reading some of the other very helpful answers makes me think that there are several things going on and it is very easy to have different ones after different colds.
I was diagnosed with a mild version of asthma, “cough variant asthma.” As far as I can tell it’s basically my trachea or whatever is more sensitive. But this after illness dry irritated cough bullshit would go on for 2-3 months after spring allergy season.
Albuterol and advair fixed it. I did fail the methacholine test though.
So there’s a few reasons, some of which have already been discussed. The first could be explained by a superimposed bacterial infection; those are risk would be children, older adults, and those with poor immune function (e.g. on immunosuppressants for auto-immune conditions). More commonly, however, is that people develop a post-viral cough unrelated to a bacterial infection. This phenomenon is generally less understood that we might like, but some more commonly accepted explanations are that the airway is more sensitive as a result of the infection, or that inflammatory mediators associated with the immune response linger around longer than the infection, which can cause local air sensitivity and edema (swelling). This is why an inhaler like salbutamol/ventolin is sometimes prescribed for a post-viral cough to open the airway and reduce swelling. Lastly, a cough is mildly traumatic to the throat and upper airway. This can cause irritation to structures like the vocal cords, which itself can bring on a cough. This leads to a continuous cough cycle because the airway is continuously irritated — think of it like scratching an itch; you scratch and so it itches more, which causes you to scratch more. This is more common than you might think and it generally treated with regularly drinking fluids when one feels the need to cough and avoidance of throat clearing. Certainly, if one has concerns about a lingering cough, one ought to see their Family Physician.
Because we are all delicate little meat sacks.
But in all seriousness I blame mucous and post nasal drip. It’s a barrier, so our body goes crazy building walls to protect us because it knows we are already weak from whatever virus/bacteria made us sick and that mucous hangs around and makes our throats irritated or our lungs weak and heavy.
Our bodies may also have picked up something else while we were weak with the first thing. Or it was so busy with killing the primary illness that it’s slow to clear up the lingering inflammation.
The dry cough that would not stop happened to my daughter. We tried everything. A pulmonologist, MD, who is a chronic cough researcher cured her instantly. It has been written about in medical journals many times. NAD Just a dad. It cures children and adults. (Peer reviewed and published.) Good luck.
[https://www.thedailybeast.com/miles-weinberger-the-doctor-behind-the-miraculous-habit-cough-cure](https://www.thedailybeast.com/miles-weinberger-the-doctor-behind-the-miraculous-habit-cough-cure)
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