The phenomenon of bleeding gums and particularly smelly may be gingivitis, but also may be caused by periodontitis and other factors. 1. Gingivitis: is one of the most common gum disease, mainly caused by plaque on the surface of the teeth caused by non-specific inflammation of the soft tissues of the gums, the gums are stimulated by long-term inflammatory factors, there can be symptoms such as congestion, swelling, and will produce tartar and odor. 2. Periodontitis: Chronic inflammation caused by plaque bacteria invading the periodontal tissues, which can be manifested as red and swollen gums, soft texture and bleeding on probing, and bleeding gums can also be a symptom of odor. 3. Calculus: is deposited on the surface of the teeth or restorations have been calcified or are calcified plaque and soft scale, which can appear bleeding gums, bad breath and swollen gums and other symptoms. If the above symptoms occur, it is recommended that the cause of the disease and actively cooperate with the doctor for treatment.