A toothache that hurts half of the head is usually caused by pulpitis. Pulpitis is a common inflammatory disease of the nerve in the oral cavity, often due to dental problems such as caries gradually spread to the pulp, or abnormal tooth development, bad brushing habits caused by wedge-shaped defects, etc., so that bacteria invaded the gum inside the dental nerve, so that the inflammatory reaction, there will be a toothache performance, because the teeth and facial nerve is connected, pain can be involved in the facial nerve, there will be affected teeth The pain is characterized by spontaneous paroxysmal pain, which occurs mostly at night. For the treatment of pulpitis, analgesic drugs can be used to relieve the pain, and after anesthesia, the pulp will be completely extracted and then root canal treatment will be performed, which can improve the patient’s symptoms to a greater extent. Anti-inflammatory drugs such as amoxicillin and metronidazole should also be used during treatment to avoid infection of the pulp cavity during treatment and also to relieve the patient’s local symptoms. In addition, other oral diseases, such as inflammation of the wisdom teeth, will also appear toothache phenomenon, serious cases can lead to the affected side of the back teeth area swelling, pain, can extend to the ear, temporomandibular joint, face, so that the toothache half of the head pain situation, need to relieve pain, eliminate inflammation, can take antibiotics anti-inflammatory drugs, under the operation of the doctor to perform wisdom tooth extraction to relieve symptoms. It is recommended to pay more attention to oral hygiene, adhere to the morning and after meals to rinse the mouth, regular dental cleaning and other oral cleaning, to reduce the retention of bacteria. Avoid eating spicy, hard and cold food to reduce the damage to the gums. If there is serious caries, treatment should be carried out in time, such as extraction of teeth, in order to prevent bacteria from invading into the gum tissue or even the alveolar bone tissue, causing local pain.