Black tooth roots have the potential to recover with aggressive symptomatic treatment. Normally, the root of a tooth is white. When it appears black, it indicates that the root of the tooth has become diseased. The roots of the teeth are in the gums and alveolar bone and are usually not visible to the naked eye. The blackness of the root is usually referred to as the blackness of the cervical part of the tooth, which may be caused by calculus or decay. If it is caused by calculus, the patient can recover to some extent by removing the calculus with a dental cleaning. However, bleeding of gums or sensitivity to hot and cold acid stimulation may occur after scaling, which can be relieved by itself after a week. If it is caused by cervical caries, different cushion materials can be chosen to fill the carious surface according to different degrees of shallow, medium and deep caries to isolate the external stimulation to the teeth; meanwhile, dental veneer treatment can be carried out to achieve the effect of whitening the roots of teeth. In daily life, patients should pay attention to the cleaning of teeth, regular examination and maintenance of teeth, try to avoid the intake of more pigmented food, stay away from carbonated drinks and strong tea, tobacco and alcohol, etc.