Some studies show that people with gum disease are more likely to have heart disease than those with healthy gums, though gum disease has not been proven to cause other diseases. Maintaining good oral hygiene, like brushing after meals and flossing daily, can help reduce the risk of gum disease and related health problems. Stress, certain medications, and various medical conditions like diabetes, Sjögren's syndrome, and HIV/AIDS can increase the risk of oral health issues by causing dry mouth or weakening the immune system.