The height of the gums of the teeth is not the same, the development of each person is different, there is a certain gap in the height of the gums, if the gap is large, there may be gum recession, gingival hyperplasia, gingivitis and so on. 1. Gum recession: when brushing teeth in an incorrect way, or toothpaste friction particles are too coarse, or excessive biting force to make the teeth move abnormally, will lead to gum recession, so that the height of the gums have a large difference. 2. Gingival hyperplasia: gingival tissue disease caused by local irritation or plaque can lead to an increase in the cellular composition of the gingival tissue, hyperplasia can be seen in the gingival margin thickening, gingival papillae rounded, so that the height of the gingival difference is large. 3. Gingivitis: Gingivitis can cause redness, swelling and pain in the gums, and there is a big difference in height between red and swollen gums and normal gums. So there is a certain gap between the height of normal gums, but when the gap is large, it is recommended that the hospital stomatology department to prevent delays in the treatment of the disease.