In order to prevent the recurrence of thyroglossal cysts after surgery, it is important to control the infection for 2-4 months before performing fistulotomy or thyroglossal cyst excision when the infection occurs. If a cyst is formed, the abscess must first be incised and drained, and then surgery must be performed after the infection is completely controlled, so that the root can be treated cleanly. Then, the thyroglossal cyst must be removed with the complete removal of the middle part of the hyoid bone and the complete removal of the posterior muscle with the blind hole of the hyoid bone to prevent recurrence, and it must be noted that only complete removal can minimize the chance of recurrence.