Long hard bumps next to the teeth need to go to the hospital to check whether it is dental tissue or gingival tissue, which can be seen in malformation of tooth development, double teeth, gingival tumor. 1. Malformation of tooth development: affected by genetic or abnormal development and other factors, it will cause malformation of tooth development, which can present multiple irregular nodules or depressions on the surface of tooth enamel, and the nodules can be appropriately milled after radiographic examination. 2. Twin teeth: due to incomplete separation of tooth germs during tooth development, twin teeth can be formed, which can be manifested as the fusion of tooth roots and crowns are separated, which can be manifested as a small nodule on the surface of the prominent crown. 3. Gingival tumor: long-term external stimulation or due to hormone level changes, can appear between the teeth gingival tumor, round with tips or lobular, touch tough. Teeth next to long hard lumps, specific need to go to the hospital to check the specific situation, and then the corresponding treatment.