4. Diabetes

Diabetic patients who do not manage their blood sugar levels properly as more likely to be prone to dry mouth and gum disease. When blood sugar levels are at an imbalance, the body loses its strength to put up a proper fight against bacteria and infections, including those that harm your gums. Those same germs are what cause bad breath.

Sometimes, you might experience a fruity or acetone-like breath (a chemical present in nail polish remover). This is usually an indication of a serious complication called ketoacidosis in people who already have diabetes. This is when there is a buildup of acids in your blood caused due to inadequate amounts of insulin. If left untreated, this could lead to a diabetic coma, or even death.