Persistent bad breath or a bad taste in the mouth may be warning signs of gum (periodontal) disease. Gum disease
is caused by the buildup of plaque on teeth. The bacteria cause toxins to form in the mouth, which irritate the gums. If gum disease continues untreated, it can damage the gums and jawbone.Many other diseases and illnesses may cause bad breath. Here are some to be aware of: respiratory tract
infections such as pneumonia or bronchitis
, chronic sinus infections, postnasal drip, diabetes, chronic acid reflux
, and liver or kidney problems.Hope this helps.