The pain in the jaw with the root of the ear is considered to be related to temporomandibular joint disorder, jaw joint injury, mumps and other reasons. 1. Temporomandibular joint disorder: When temporomandibular joint disorder occurs, it can lead to pain at the ear root of the jawbone under the ear screen, and the pain is most obvious when opening and closing the mouth and opening the mouth widely. At the same time, it will also lead to popping sound in the position of the ear screen, and even the situation of not being able to open the mouth or not being able to bite the teeth. 2. Damage to the jaw joint: when the jaw joint is damaged, it can not only lead to pain in the jaw joint. It can also lead to limited movement of the jaw joint and difficulty in chewing food. 3. Parotitis: Infection, parotid duct obstruction, autoimmune reaction and other factors can lead to parotitis disease. Parotid gland enlargement occurs, which has the characteristics of developing forward, backward and downward between the back of the mandible and the mastoid process, centered on the earlobe, with unclear margins. At the same time, the symptoms of pain in the jaw attached to the ear can also occur. When the symptoms of chin with ear pain appear, it is recommended to go to the hospital in time to clarify the cause of the disease and carry out targeted treatment under the guidance of the doctor.