The best time for lip tie revision is 6 to 7 years old. The best time for lip tie revision is 6~7 years old. It is not easy for patients to cooperate with the surgery when they are less than 6 years old, and when they are more than 7 years old, when the mesial incisors are erupting, the low labial tie will easily cause the mesial gap of the mesial incisors to be too big, which will increase the difficulty of the correction, so the most suitable age is 6~7 years old. At the age of less than 6 years, when the low labial tie is found, you can continue to observe, because there will also be in the process of development, the attachment of the labial tie improves. At the age of 6~7 years, the two maxillary mesial incisors erupt, observe the eruption with or without a mesial gap and whether the labial tie is too low. Lip tie surgery is performed 7~10 days later for follow-up to remove the stitches, after removing the stitches with the muscle function training exercises, which is helpful to correct the bad habits of the lips.