Nerve leakage, i.e., the nerve of the tooth is exposed, cannot be filled directly. It is recommended that the patient fill the tooth after root canal treatment, in addition, the patient should pay attention to oral hygiene and adjust the diet. 1. Patients with exposed nerve should not be filled directly, the patient’s exposed nerve represents that the patient’s tooth tooth itself has been pulp damage or pulp necrosis has occurred, if the direct filling, pulpitis will be more serious, and even lead to periapical inflammation. 2. It is recommended that the patient undergo root canal treatment before filling to cure the pulpitis completely and remove the infected pulp before filling, which can effectively avoid the occurrence of more serious periapical periodontitis and osteomyelitis of the jawbone. 3. It is recommended that patients with exposed dental nerve should ensure oral hygiene and brush their teeth on time after treatment. Patients should pay attention to their diet and eat less spicy and stimulating foods, such as chili peppers, garlic, etc., and less hard foods, such as nuts and hard candies. Patients with exposed dental nerve can not directly fill the tooth, it is recommended that patients seek medical advice in time and follow the doctor’s instructions for treatment. Patients should usually ensure dental hygiene and adjust their daily diet.