Wisdom teeth that grow horizontally, i.e., horizontally impeded wisdom teeth, usually do not push the neighboring teeth crooked, but may cause diseases or symptoms such as root resorption of the neighboring teeth, as described below. The neighboring teeth of wisdom teeth are usually the second molars. Although the horizontally impeded wisdom teeth may have some pressure on the second molars, they are usually not crooked because they are supported by the first molars in the proximity of the second molars and the second molars themselves have strong roots. If a horizontally impeded wisdom tooth is adjacent to the root of the second molar, the root may resorb under exogenous pressure. In addition, horizontally impeded wisdom teeth may cause diseases or symptoms such as pericoronitis, decay of neighboring teeth, and food impaction. If any of these symptoms occur, it is recommended to go to the hospital in time for early targeted treatment.