Although sodium chloride has a certain bactericidal effect and can target some bacteria in the oral cavity, the effect is not ideal, so the clinical use of salt water as oral disinfection is not used. Toothache can be divided into pulpitis and apical inflammation, pulpitis is mainly pain caused by dental nerve infection, apical inflammation is caused by periapical pain after pulpitis, both of which are treated with root canal as the main method, if necessary, can be supplemented with ornidazole, cephalosporins oral anti-inflammatory, local can use chlorhexidine rinse, metronidazole rinse, ornidazole rinse, triclosan rinse, etc., can play a better effect than saline.