The yellow inside of the teeth may be plaque, calculus, generally need to pay attention to oral hygiene, can also be scaling treatment. 1. Oral hygiene, we must pay special attention to personal oral hygiene in our daily lives, keep our mouths clean, brush our teeth and rinse our mouths before going to bed at night, and remove the food debris in our mouths thoroughly, so as to prevent the gathering of food debris and to avoid the yellowing of teeth. 2. Dental scaling treatment, if plaque and calculus, you can regularly seek medical attention for dental scaling, through ultrasonic vibration can remove plaque and calculus gathered on the teeth, to avoid aggravation of symptoms. Usually need to pay attention to oral health, regular medical oral examination.