Wisdom teeth that lie horizontally need to be extracted because they have no hope of erupting, and their retention will cause a series of problems, such as causing the soft tissue above the wisdom tooth to retain a large amount of bacteria as well as food debris and forming a blind pocket, which is particularly susceptible to the formation of pericoronitis of the wisdom tooth, which can cause recurrent and severe pain, and cause a great deal of pain to the patient. Wisdom teeth that lie horizontally are particularly susceptible to decaying the distal mesial apex of the front second molar, which can cause certain problems with the front molars. Wisdom teeth that grow horizontally can cause crowding of the entire tooth row, which in turn affects the patient’s aesthetics and occlusion to a certain extent. Therefore, it is recommended that wisdom teeth that grow horizontally be extracted as early as possible when there are no painful symptoms once they are found in the clinic.