Eli5: What is the purpose of a dry cough?

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Specifically when you’re sick, not lung cancer or anything like that.

A wet cough is called “productive” because it clears fluid/mucus from your lungs.

So what does a dry cough actually “do” for the body? Is it just a reaction to something with no specific purpose?

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2 Answers

Anonymous 0 Comments

It’s just a reaction to an irritant.

Not everything our body does has a “good” reason. Some things are just reactions to stimuli real (like a “dry” spot in your throat, or maybe a bit of dust) or imagined (for lack of a better term). Kind of like those random itches that just happen. Nothing’s touching you there, and you haven’t been bitten or whatever. Just a weird nerve impulse your brain interprets as “it itches there”

Anonymous 0 Comments

I had wondered this also. It’s like the Covid cough – just makes for a really sore throat and aching ribs.