Causes of persistent bad breath beyond oral hygiene

Persistent bad breath, or halitosis, is not always caused by poor oral hygiene. While common triggers include tongue coating, gum inflammation, cavities, or problematic dental prosthetics, the underlying cause may lie beyond the mouth.

Dry mouth, or a lack of saliva, is a significant factor. Saliva acts as a natural cleanser that transports food residue and regulates the bacterial environment. When saliva production decreases, odor-causing substances can accumulate more easily. This dryness can be a side effect of certain medications, though patients should never stop taking prescribed drugs without consulting a doctor.

Other potential causes include chronic tonsillitis, sinus infections, or, more rarely, systemic diseases involving other organs. Symptoms of dry mouth often include a sticky sensation in the mouth, burning mucous membranes, or increased odor after long periods of speaking. To manage these issues, experts suggest maintaining hydration, using sugar-free gum to stimulate saliva, and consulting medical professionals if oral hygiene alone does not resolve the problem.