Bad breath prevention may not be a huge priority for most of us but perhaps it should! It is common for halitosis to be a warning sign for a more serious medical problem, such as: Acid Reflux, Diabetes, Sinus Infection, Upper Respiratory Problem, Kidney or Liver Disease and Periodontal Disease. Periodontal disease (also known as gum disease) is the second most common cause of bad breath. If the bad breath and gum disease are left untreated, the bacteria responsible for both conditions will increase in numbers and create an infection in the gingival tissue. Gingivitis is the mildest and most common form of gum disease but it can worsen and include symptoms like: bleeding gums that continue to worsen as condition progresses, lesions forming on the gingival tissue, mild fever, chronic bad breath, appearance of gray film on the teeth and gums and gums very sore to the touch.