Yellowing of the teeth is a symptom of tooth coloring, and Keflex is a laxative and has no role in treating tooth coloring. Dental staining refers to the abnormal color of the surface of the teeth, usually manifested as the surface of the teeth black or yellow. The main ingredient of Keserol is glycerin or sorbitol, which is a medicine for treating constipation, and it does not have bleaching effect, so it can’t treat tooth coloring. Normal teeth are yellowish translucent ivory color, when the occurrence of tooth coloring, according to the specific circumstances of the dental surface cleaning treatment, dental bleaching, shade restoration and other ways of treatment. Such as tobacco, tea, coffee, oral plaque and other causes of tooth coloring, ultrasonic, sandblasting cleaning can be used to clean the surface of the teeth. Such as fluorosis, tetracycline teeth, etc. can be treated with dental bleaching. Specific treatment varies from person to person, it is recommended to follow the doctor’s instructions to standardize the treatment, do not use their own prescription.