Lower incisor pain can be caused by a number of factors, which may be physiological factors or pathological factors, pathological factors include such as cryptocleidosis, apical inflammation and so on. 1. Physiological factors may be caused by eating cold, hot, acidic dietary stimuli caused by pain, this lower incisor pain in the elimination of the stimulus after the disappearance of a short period of time, do not need to do more treatment. 2. Cracked teeth can also cause pain in the lower incisors, if you usually like to eat too hard food, it may lead to cracked teeth, the teeth have cracks, when biting on the cracks, it will produce a painful feeling. 3. Apical inflammation, also known as periapical inflammation, is an inflammatory disease that occurs in the tissues around the root tip of the tooth, mainly triggered by the infection of the pulp through the apical foramen acting on the apical tissues, which leads to lower incisor pain. If you exclude physiological factors lower incisor pain, it is recommended that when lower incisor pain occurs, timely medical treatment to identify the cause and then targeted treatment.