2. Chronic Conditions That Cause Bad Breath
Sometimes, the cause of bad breath from lungs is a life-long affliction. Individuals with cystic fibrosis (CF) can experience bad breath as a symptom of the disease, according to the American Rhinologic Society. This condition causes thickened mucus in the lungs, and as a result many CF patients have recurrent airway infections and post-nasal drip. This disease is inherited and has no cure, so the thickened mucus and difficulty breathing may always be a concern.
Asthma is another respiratory condition that can cause bad breath, explains Delta Dental. People with asthma often breathe through their mouths, which dries out oral tissues. Many of the bacteria that cause bad breath flourish in a dry mouth. Additionally, medicated inhalers can also have a side effect of dry mouth, further compounding the problem.
Lung cancer is another condition that has a distinctive odor and can be even identified by the specific combination of gases in a person's breath, MIT News reports. A group of students from MIT and Harvard developed a smartphone-connected sensor that detects these compounds and provides a safe and inexpensive way to detect the disease.