The standard of oral health is tooth cleaning, no caries and pain, normal gum color and no bleeding.You can self-test whether your mouth is healthy according to the following methods. If you find abnormalities, see your teeth in time to avoid increasing the difficulty of treatment.How to self-test oral health?1. Bleeding gums When you brush your teeth, see if there are blood stains on the spitting foam and toothbrush. When eating fruits such as apples or pears, see if there are any signs of bleeding.Take a look at the gums in the mirror. If the gums are red, swollen and pus, you need to be alert for gingivitis.Gum bleeding caused by local factors is common periodontitis and gingivitis.2. Yellow and black teeth. Carefully observe the tooth surface and occlusal surface to see if there is any yellowing or blackening.Most adults and children have yellow and black teeth. If you see obvious stains and calculus, you need to go to the hospital to wash your teeth.3. There is an odor in the mouth. Use your tongue to lick your arm and close your mouth. Smell whether there is any odor in the part you just licked. The odor may be periodontitis and gingivitis.4. Caries To see if the color between the two teeth or the root of the tooth is abnormal or has holes, check whether there are small black spots on the surface of the tooth.If there are holes and black color, it may be dental caries.5. Sensitive teeth There is obvious soreness when the teeth are stimulated by hot, sour, sweet and mechanical effects. The temporary or temporary soreness can disappear after the stimulation is removed. This is the root exposure caused by the decline of the gums.6. When there are cracks on the surface of the teeth, there is severe pain when biting on a certain part.Carefully observe the bite pain area, you will find a dark brown or light black crack line, may cross the occlusal surface of the tooth, or may be seen near the edge, slightly touching the cracked part will cause pain, which meansA cracked tooth appeared.7. Gingival atrophy Although the adjacent teeth are in contact with each other, the gums between adjacent teeth do not completely cover the adjacent points of the teeth. The triangle gap can be seen with the naked eye, which is related to the alveolar bone absorption and gum atrophy.8. Loose teeth Unexplained loosening of teeth and changes in occlusion, accompanied by exposed roots, obvious bad breath, and swollen gums, should be warned of periodontitis.9. Tooth pain Tooth pain indicates a problem with the tooth, which is generally related to pulpitis, periodontitis and gingivitis.Should go to the hospital to find out the reason, and then targeted treatment, can not abuse pain medication.Warm reminds that dental health is the foundation of good health, so it is imperative to take good care of teeth.Avoid eating high-sugar and too sticky foods. Chewing nuts, celery or apples containing crude fiber properly can not only clean the tooth surface, but also make the teeth stronger.And to master the correct way of brushing your teeth, at least once a year to do oral examination and teeth washing.