Smelly gums when flossing

A smell from one gum space during flossing often comes from trapped plaque, food, decay, or gum inflammation.

Flossing lifts bacterial plaque and food debris from between teeth, so an odor may be noticed when that material is disturbed. Inflamed gingiva can bleed or smell, and a deeper periodontal pocket can retain debris below the gum edge. One localized odor suggests a problem around a particular contact, filling, cavity, or gum pocket; odor throughout the mouth can also involve tongue coating, dry mouth, smoking, or nasal and throat conditions. A smell that remains after careful cleaning should not be dismissed.

Clean between the teeth once daily with floss or an appropriately sized interdental brush, and brush the tongue gently. Do not snap floss into the gums or rely on breath mints; a dentist or hygienist can remove calculus and measure pocket depths when home cleaning is not enough.

Book dental care if the odor persists, the gums bleed repeatedly, or there is swelling, pus, loose teeth, pain, or a bad taste. Prompt assessment is especially important when one area is difficult to clean or a filling traps food.

Is there calculus, a cavity, a leaking filling, or a periodontal pocket at that site? Which interdental cleaning tool fits the space, and do I need a professional cleaning or periodontal treatment?