Loose bleeding gums may be periodontitis, systemic diseases, oral neoplastic diseases and so on. 1. Periodontitis: Periodontitis mainly refers to bacterial infection of the gums and periodontal tissues, resulting in chronic inflammation of the gums and periodontal tissues, periodontal pocket formation, attachment loss, alveolar bone resorption, and then loose teeth, bleeding gums, or even fall off. The main cause of the disease is dental calculus and plaque attached to the gums, periodontium and teeth between the surface. 2. Systemic diseases: such as leukemia and diabetes. Leukemia will appear coagulation abnormalities, if the gums at this time local inflammation, can lead to bleeding, and in severe cases can lead to loose teeth. Diabetic patients with high blood sugar are prone to bacterial infections, which can easily lead to the accumulation of dental calculus and plaque and periodontitis. Both will promote the development of the disease and aggravate the possibility of loose teeth. 3. Oral neoplastic diseases: when gum cancer, gingival tumor, enamel cell tumor and other tumors invade the teeth, loose teeth and bleeding gums may also occur. There may be other reasons for loose bleeding gums, so patients are advised to consult the doctor in time, ask the doctor to clarify the specific reasons and carry out corresponding treatment if necessary.