Gum bleeding that lasts for a year is usually not a precancerous sign. When gum bleeding occurs, priority is usually given to oral diseases such as calculus, gingivitis, and periodontitis. Tartar, also known as tartar, is usually found on the surface of the teeth at the opening of the salivary glands. Calculus is a foreign body to the oral cavity that constantly irritates periodontal tissues, compresses the gums, affects blood circulation, causes germ infection of periodontal tissues, and causes inflammation and recession of the gums or bleeding. Gingivitis is a lesion confined to the gingival tissue, mainly located in the free gingiva and gingival papillae, usually due to the accumulation of plaque in the gingiva-dental junction and the harmful substances in it acting on the gums for a long time, causing inflammation and bleeding. Periodontitis is a chronic inflammation of the supporting tissues of the periodontium caused by local factors. Clinically, patients may experience secondary gingival bleeding or bad breath, similar to the symptoms of gingivitis. If the gums bleed for a long period of time, the patient should go to the stomatology department of the hospital for blood tests and symptomatic treatment after a clear diagnosis, and the patient should also pay attention to avoid eating cold, spicy and other stimulating foods.