Children’s teeth with black stains may be pigmentation, endodontic disease, caries and other conditions caused by the removal of timely brushing, root canal treatment, repair of caries and other ways to deal with. 1. Timely brushing: pigmentation is the most common reason for children’s teeth to appear pigmented spots, which is mainly due to children’s young age, poor self hygiene and other reasons. Parents should let children brush their teeth carefully, eat less food with pigmentation, and in serious cases, they can go to the dentist for cleaning treatment to remove stains. 2. Root canal treatment: children’s dental pulp diseases can lead to discoloration and blackening of the teeth, in this case you need to carry out root canal treatment on the affected teeth, using instruments to remove the infected pulp and other substances, root canal rinsing and then root canal filling, which can effectively alleviate and control the infection. 3. Repairing caries: Children’s teeth with caries can also lead to black stains on the teeth. At this time, it is necessary to go to the dentist in time, can use fluoride drugs, such as 75% sodium fluoride glycerin paste for treatment, can also use resin and other materials to repair damaged teeth. When there is a substantial defect in the tooth tissue that cannot be repaired on its own, it is necessary to completely remove the decayed tissue and fill it with filling material for treatment. Since there may be other reasons for the dark stains on children’s teeth, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease and then give targeted treatment.