Gums generally do not repair themselves, when the gums due to various factors of gum recession, will lead to the root of the teeth become longer, the gap between the teeth become larger or even root bifurcation exposure, and the gums will not repair themselves. 1. Gums are attached to the neck of the teeth and alveolar bone, normal gums show pink, soft texture, thin form, touch will not bleed. When inflammation occurs in the gums, the gums will recede accordingly and the alveolar bone will absorb, and periodontal pockets will appear. 2. The gums are attached to the alveolar bone, so the gums will recede accordingly, and the resorption of the alveolar bone is irreversible, so the gums can not be repaired by themselves. In summary, the gums of the shrinkage is not self-repair, gum recession is important to prevent, usually should pay attention to personal hygiene, maintain oral hygiene, so as to avoid gum disease.