Acute pharyngitis can potentially cause a painful bite. However, it may also be caused by diseases such as mumps and bruxism. 1. Acute pharyngitis: the disease is caused by viral, bacterial and other pathogenic microorganisms infections, such as coxsackievirus, streptococcus and so on. It is also related to factors such as high temperature, smoke, exposure to allergens, excessive smoking and alcohol. The common symptoms are dry and itchy eyes, sore throat, and because the pain sometimes extends to the ears, a sore bite may occur in some cases. 2. Mumps: This disease is infected by the mumps virus, which can be transmitted through the respiratory tract, indirect transmission, and vertical transmission. Typical symptoms are centered on the earlobe, moving forward, backward, and downward, and may be manifested as biting muscle pain and swelling. 3. Teeth Grinding Disorder: Research shows that this disease may be related to excessive mental stress, nerve dysfunction, dental occlusion disorders, heredity, periodontitis and other factors. The common symptom is that the maxillofacial muscles have tenderness and pressure pain, so the patient will have the manifestation of biting muscle pain. It is recommended that patients with acute pharyngitis biting muscle pain go to the hospital, complete the relevant examination, clarify the specific cause, and treat the cause.