Runny nose, respiratory and tonsil infections, sinus problems, diabetes, liver and kidney problems, and certain blood disorders can cause bad breath. In some less common cases, bad breath could be a sign of cancer or other serious conditions, such as metabolic disorders.
Halitosisis an oral health problem in which the main symptom is bad breath. In most cases, finding the cause of bad breath is the first step in treating this preventable condition.
Often, the dentist simply smells the breath of a person suspected of halitosis and rates the smell on a six-point intensity scale. Dry mouth can be caused by certain medications, a salivary gland disorder, or by always breathing through the mouth instead of through the nose. An abscess or infection in the mouth, throat, or lungs can cause the breath to smell like rotting tissue. Some people worry too much about their breath even though they have little or no smell in their mouths, while others have bad breath and don't know it.
Low-carb diets cause you to burn body fat for fuel, leading to the release of chemicals called ketones in your breath and urine. Because it's difficult to assess how your own breath smells, ask a close friend or family member to confirm your questions about bad breath. If bad breath persists despite controlling for these factors, it is recommended that the person see a doctor for further tests to rule out other conditions. These bacteria cause the release of volatile sulfuric compounds (VSC), gases that cause breathing problems.
Smelling your own breath is surprisingly difficult, but there are a few ways to check if your breath is less than fresh. As mentioned above, the most common reason for bad breath is oral hygiene, but other situations can also be to blame. If something blocks the flow of waste through your intestines, your breath may start to smell like faeces.