The normal color of a person’s dental bed is pink, and the gingival mucosa overlying the dental bed is tough and elastic. Abnormalities in the color of the gingival mucosa usually reflect the occurrence of different oral diseases. If the gums are bright red or dark red, with congestion and edema, most often there is gingivitis and periodontitis, both of which need to be treated with ultrasonic scaling and subgingival scraping. If the mucosa on the bed of the teeth appears white reticular changes, suggesting the presence of lichen planus, the disease needs to be injected with hormone therapy, and if the mucosa on the bed of the teeth appears to be eroded, bleeding, broken, most likely suffering from oral ulcers. When the mucous membrane of the dental bed appears white proliferation of plaque, suggesting that the mucous membrane white spot, white spot is a pre-cancerous state, once found to be as early as possible surgical resection. In addition, herpes stomatitis and bacterial stomatitis can cause the color of the dental bed to turn red, and even blisters and erosion.