The reasons for frequent bleeding in the oral cavity are as follows: 1, daily after meals can not be brushed in a timely manner, the food residue, soft scale, plaque, etc. retained on the teeth will combine with saliva to form calculus, stimulating the gums to redness, swelling and bleeding; 2, there are bad restorations in the teeth or too large a gap between the teeth often occur food embedding, causing inflammation of the gingival papillae, appearing bleeding; 3, long-term use of aspirin and other anti-coagulant drugs, the destruction of the body’s coagulation mechanism, there is spontaneous bleeding; 4, suffering from leukemia, thrombocytopenia and other diseases produce coagulation disorders, the oral mucosa, gums and the skin of the body will appear bleeding.