Why do elderly people have bad breath?

Older adults commonly experience bad breath, which may stem from multiple underlying causes. 1. Physiological recession of periodontal tissues in the elderly may create gaps between teeth, allowing food debris to accumulate. Bacterial fermentation of this debris can then produce an unpleasant odor. 2. Oral diseases such as dental caries, gingivitis, and periodontitis are also significant causes of halitosis. These conditions promote bacterial growth in the mouth, leading to the production of foul-smelling substances. 3. Gastrointestinal disorders such as peptic ulcers and chronic gastritis may also cause bad breath, as these conditions directly affect the health of the digestive system. 4. In addition to physiological factors, certain lifestyle habits and medications may contribute to halitosis in older adults. If concerned, it is recommended to seek timely medical consultation for professional diagnosis and treatment by a qualified physician.