Toothache from eating acid belongs to tooth sensitivity, which may be caused by increased dentin sensitivity, enamel loss, pulpitis, dental caries and other reasons. Patients need to go to the hospital for laser treatment, filling treatment, root canal treatment, etc., and need to take good care of their teeth in their daily life. 1. Laser treatment: It is a desensitization treatment, which mainly involves applying a heat-sensitizing agent to the surface of the affected tooth, and then irradiating the affected tooth repeatedly with a laser. The treatment process is generally more comfortable and simple. 2. Filling treatment: This refers to the use of materials such as bonding agents, resins, fluoride, etc., to fill in the exposed dentin tubules in order to alleviate tooth sensitivity and soreness. 3. Root canal treatment: the pulp of the affected tooth is removed, then the material is filled in and a crown is made, which is suitable for dentin sensitivity caused by diseases such as pulpitis. You need to consult a doctor as soon as possible if you eat acid, and the operation treatment needs to be completed by a professional doctor. In daily life, you need to pay attention to the protection of teeth, avoid eating excessively sour, sweet, icy, hot food, so as not to cause the symptoms of toothache.