Swollen gums and bleeding are common in the following cases: 1, when suffering from adolescent or pregnancy gingivitis, the body hormone level changes, the local presence of calculus, plaque, etc., resulting in chronic inflammation of the gums, capillary hyperplasia, brittle become large, swollen gums at the same time easy to bleed; 2, long-term use of calcium ion antagonists such as nifedipine, will make the gums occur fibrous hyperplasia, the volume is significantly larger than normal The gums are particularly prone to oozing blood; 3. The presence of poor restorations on the adjacent surfaces of the teeth and frequent food impaction will stimulate acute inflammation of the gingival papillae, and the red and swollen gums will cause severe pain while oozing blood, resulting in gingival recession over time and the need to remove and recreate the restorations.