Wisdom teeth that grow horizontally are difficult to remove when they are just peeking out. 1. Wisdom teeth, also known as the third molar, are located at the very end of the tooth row; because they usually do not have normal chewing function, and most of them erupt ectopically, which can lead to recurrent inflammation of the pericoronal gingiva or affect the neighboring normal teeth. For example, if the wisdom teeth are blocked horizontally, they usually cannot erupt normally and only part of the tooth tissue is exposed, and the wisdom teeth will be repeated pericoronitis or the top of the neighboring teeth will be damaged. 2. Therefore, it is recommended to remove the wisdom teeth that grow laterally in time, because its body is less exposed, so it is necessary to cut and separate the gingiva on the crown side; and because of the lateral obstruction, the wisdom teeth can not be removed completely, and it is necessary to divide the teeth into several parts in order to remove all of them. Therefore, it is difficult to remove the wisdom teeth with transverse obstruction, and it is one of the more difficult types of wisdom tooth removal surgery.