If wisdom teeth can erupt orthodontically and establish a normal occlusal relationship with the opposite jaw, it is generally not harmful to the oral cavity. If wisdom teeth erupt ectopically or there is an obstruction, it may lead to symptoms and lesions in the neighboring tissues, as follows. 1. Wisdom teeth erupt orthodontically and establish a normal occlusal relationship: in this case, wisdom teeth are generally not harmful to the oral cavity, and can exercise normal chewing function. 2. Ectopic eruption of wisdom teeth or the presence of obstruction: may cause pericoronitis, wisdom teeth or neighboring teeth caries, food impaction, root resorption of neighboring teeth, destruction of neighboring periodontal tissues, temporomandibular joint disorders, etc., which cause different degrees of harm to oral health. If the above symptoms occur, it is recommended to go to the hospital in time to receive professional treatment as soon as possible.