After a long time, combined with the minerals separated from saliva deposited in the tartar, it will form a hard calculus, also known as calculus.
these soft and hard tartar (i.e. calculus) constantly stimulate the gums, plus the continuous invasion of bacteria, it will cause gingivitis, manifested as gingival redness and swelling, gingival margin ulceration, as long as a little touch, it will cause bleeding.
some young people have swollen and swollen gums due to unclean mouth, so it is a soft feeling to press gums with fingers.
Some of the hyperplastic gums can cover 1 / 3 to 1 / 2 of the tooth surface, can cover the tartar and calculus under the hyperplastic gums, thus causing frequent gingival bleeding.
can also make the gums hyperplastic by taking drugs for epilepsy.
also has improper use of toothpicks, inlaid with unreasonable dentures, sharp stimulation of the edge of caries holes, and hard food residues with impaction, etc., which can also cause local gingival bleeding
There are also some systemic diseases in the later stage, which can cause low coagulation or severe anemia, but also can produce symptoms of gingival bleeding, such as cirrhosis, hypersplenism, nephritis in the later stage, disseminated lupus erythematosus, etc.
gingival bleeding is also a prominent symptom of scurvy.