Periodontitis is a serious gum disease that affects the tissues supporting your teeth. It starts with gingivitis, a milder form of gum disease that causes redness and swelling. If left untreated, it can progress to periodontitis, leading to the destruction of the bone and tissue around the teeth. Symptoms may include swollen gums, bad breath, and even tooth loss. The main cause of periodontitis is the buildup of plaque, a sticky film of bacteria that forms on teeth. Good oral hygiene, including regular brushing and flossing, can help prevent this condition. Regular visits to the dentist are also essential for maintaining healthy gums and teeth.