6-year-old boy behind the big teeth long meat may be the replacement of teeth, gingivitis and other factors. 1. Teeth: children are usually around 2 and a half years old to grow all the milk teeth, 6 years old to 6 and a half years old to start changing teeth, if the 6-year-old boy behind the big teeth long meat, may be the permanent teeth have not grown out of the result, generally do not have to worry too much. 2. Gingivitis: If there is pain or brushing and biting bleeding, consider whether it is poor oral hygiene caused by gingivitis, usually long meat will accumulate soft dirt and other dirty things, there may also be pain or biting bleeding symptoms. If you don’t pay attention to oral hygiene at this time, it can lead to gingivitis, such as the accumulation of food debris near the flesh of the gum flap. If there is no discomfort behind the 6-year-old boy’s big teeth, it is recommended not to worry too much. If discomfort occurs, it is recommended to consult a doctor in time for examination.