You can eat after scaling, and scaling treatment usually does not interfere with eating. However, for patients with moderate to severe periodontal disease, the roots of the teeth may be exposed because of the presence of varying degrees of alveolar bone resorption. The scaling process will completely remove the tartar and bacteria surrounding the roots of the teeth, leaving the roots exposed in the mouth, which can then cause dentin hypersensitivity due to dentin exposure. Therefore, it is not recommended to eat too cool, hot, sour and sweet stimulating food immediately after scaling, especially sour and sweet food will cause sour and soft teeth, too hot and cold food will cause different degrees of tooth pain, so there is some attention to the diet after scaling. If the tooth soreness is very serious, you can use desensitizing toothpaste to brush your teeth to relieve the symptoms, usually after 1-2 weeks such symptoms will gradually disappear.