1, malocclusion: refers to the occlusion relationship of teeth in the oral cavity deviating from the normal occlusion standard. The protrusion of the lower lip is usually caused by the position of the mandibular teeth too far ahead, which is divided into two situations: tooth protrusion and mandibular protrusion. The development of dentition can be restored by wearing orthodontic appliances, and the lower lip can be pulled back when the dentition is aligned.
2. Hypertrophy of lower lip tissue: It belongs to physiological reasons, mostly caused by genetic factors, and some are caused by bad habits, such as biting lips and breathing with the mouth open. To get rid of bad habits, keep your lips relaxed and tight at ordinary times. If the lower lip is still protruding, we can treat it by lip plastic surgery.