Based on the underlying cause, halitosis is divided into three classes: Physiologic halitosis, pathologic halitosis, and psychogenic halitosis. Food substances usually cause physiologic halitosis with a strong smell, such as onion, garlic, etc. In other cases, the accumulation of food particles within the oral cavity for a long time can also cause bad breath. Any abnormality that reduces the salivary flow rate or causes dry mouth contributes to physiologic halitosis.
There are numerous causes of bad breath. Many causes are harmless, but some conditions that can cause bad breath can be serious. Causes of bad breath include: Bacteria in the mouth Dry mouth Gum disease Food Smoking and tobacco use Certain medical conditions Sinus condition Gastric reflux (GERD) Diabetes Liver or kidney disease Acute rheumatic fever Lung abscess Blood dyscrasias Uremia Diphtheria, dysentery, measles, pneumonia, scarlet fever, tuberculosis Syphilis Hand-Schuller-Christian disease Scurvy Wegner`s granulomatosis Dry mouth When people are stressed, their mouth often gets dry Alcohol and caffeine — which people may consume when stressed — are diuretics that can contribute to dry mouth Without adequate saliva, bacteria can build up Poor eating When people are stressed, they may eat foods that can cause bad breath (foods high in sugar can cause bad breath) Smoking and tobacco use When people are stressed, they may tend to smoke or use tobacco, which can also cause bad breath and oral health problems Acid reflux Stress can aggravate GERD, which can result in bad breath Bad breath (halitosis) is an embarrassing problem of undesirable odor coming from the mouth. An estimated 65% of Americans have had bad breath and many people are not aware they have it.
