Poor oral hygiene:
Food debris accumulates between the teeth and on the gums, causing bacteria to multiply. The sulfur compounds released by these bacteria are the cause of the bad smell. Dirt on the tongue is also a major cause of bad breath.
Diseases of the teeth and gums:
Gingivitis/Periodontitis and cavities can cause bad breath.
Dry mouth:
When saliva decreases, bacteria in the mouth cannot be removed. This is why people who sleep with their mouths open experience bad breath when they wake up in the morning.
Diet:
Onions, garlic, and spicy foods cause bad breath. After being digested, these reach the lungs through the blood and are exhaled.
Smoking and drinking:
Smokers have a distinctive odor in their mouths, which can cause dry mouth.
Health problems:
Sinusitis: Bad breath can occur when a nasal infection travels down to the throat.
Digestive problems: Gastritis, acidity, and stomach ulcers can cause bad breath.
Diabetes: High blood sugar levels can cause a distinctive odor in your breath.
