Painful and itchy teeth can be caused by caries, gingivitis, and wisdom tooth pericoronitis. 1. Dental caries: When the teeth are infected by bacteria, the teeth will be corroded, which will lead to symptoms such as blackening and loss of teeth. It can also lead to itching and pain in the teeth and the nerves. When the nerve is stimulated by cold, heat and other factors, it can lead to symptoms of itching and pain. 2. Gingivitis: If the gum tissues are infected by bacteria, it will lead to inflammation of the gum tissues, which will lead to itching and pain in the gums, and at the same time, it will also lead to the appearance of foreign body sensation. 3. Wisdom tooth pericoronitis: When there is too much bacteria on the wisdom teeth, it is easy to lead to the formation of wisdom tooth pericoronitis. If you don’t rinse your mouth in time after a meal, it will cause food debris to adhere to the surface of the wisdom teeth, which will lead to repeated inflammation of the wisdom teeth and symptoms of pain and itching. When the teeth are painful and itchy, it is recommended to go to the hospital dentist as soon as possible to clarify the cause of the disease and treat it as soon as possible so as not to aggravate the symptoms.