Yellow stuff on the teeth can not be brushed off may be tartar, dental surface deposits, etc. Treatment methods include medication (such as bleaching drugs, anti-inflammatory drugs), physical therapy (such as cold light irradiation), abrasion of dental tissues and so on. 1. Calculus: When tartar and calculus are attached to the tooth surface, artificial or ultrasonic scaling should be used. If the surface of the teeth becomes yellow, the teeth can be disinfected acutely and bleached by applying hydrogen peroxide and other drugs, and then combined with cold light irradiation, the teeth can be whitened quickly. 2. Dental surface deposits: when the dental surface plaque index is high, patients can first use saline, hydrogen peroxide solution, chlorhexidine and metronidazole solutions such as rinsing or rinsing periodontal, gingival sulcus on iodized glycerin. When yellow plaque appears on the surface of the teeth, the yellow tooth tissue can be abraded and all-ceramic white veneers can be made. In addition to the above methods, when the teeth become yellow in color and accompanied by substantial defects, porcelain crowns can be made to completely change the color of the teeth. It is recommended to go to the dentistry department to find out the cause after a thorough examination and deal with it accordingly.