2. Gastric reflux
In order to digest our food, our stomach produces acid fluids that dissolve all we eat. Ideally, that acidic mix shouldn’t go up to our esophagus, because it can burn the inside of it and hurt it. The same thing happens if for some reason that acidic fluid goes up to our throat or our mouth. Healthy stomachs have a superior sphincter called the pylorus, that only opens when we swallow or throw up, and the rest of the time stays closed so what is inside the stomach stays inside the stomach. When the pylorus fails, the movement of our stomach may push its content upwards, causing a number of problems.
Gastric reflux can cause dry cough because our throat is irritated by the acid from the stomach that reaches it chronically. If you have a persistent dry cough but have other symptoms of gastric reflux such as heartburn and regurgitation (food or liquid popping back in your mouth after you have swallowed it), then you should get checked to confirm a possible digestive problem.