Why does sugar cause cough?

There is no scientific evidence to suggest that sugar consumption directly causes coughing. Some people may experience a scratchy throat sensation or increased phlegm production after consuming sugary foods or drinks, but this is usually a temporary, individual, and transient reaction rather than a persistent cough.

Coughing is typically a body's natural response to clear irritation or inflammation in the respiratory tract. Common causes of cough include viral or bacterial infections, allergies, and asthma. If you are experiencing a cough and suspect it may be related to your diet, consulting a healthcare professional to determine the underlying cause, which may not necessarily be sugar related.