Coughing is one of the body’s natural defenses. Forcing out air at speed clears your throat and nose of things that shouldn’t be there. Viruses and bacteria, phlegm, mucus and other irritants. Cake crumbs sometimes. In turn that protects your airways and lungs.
A nagging cough is one of the common symptoms of allergy. Often linked to allergic rhinitis (hay fever), it can go on for weeks or longer depending on your trigger.