In anatomical theory, the standard term for “jawbone” is “mandible”. The presence of hard lumps in the jawbone is not necessarily cancer, and the specific situation needs to be diagnosed in the hospital to determine. 1. Inflammation: hard lumps in the jawbone may be inflammation of hair follicles, which is caused by sebaceous gland secretion and hair follicle blockage, and is related to life rules, dietary habits and mental stress. It is recommended to take a light diet, do not stay up late, develop good habits, and apply anti-inflammatory ointment, such as fusidic acid ointment; 2. Tumor: tumors appearing in the mandible may be benign tumors or malignant tumors, such as mandibular cyst, submandibular gland fibrosarcoma, submandibular gland malignant tumor and so on. Specifically, you need to go to the Department of Pentacameral Medicine of the hospital for CT examination to determine whether it is a tumor, benign or malignant. If it is a malignant tumor, it needs to be removed through surgery. Hard lumps in the mandible are not necessarily cancer, but should be consulted in time, diagnosed clearly under the guidance of specialists, and actively cooperate with the treatment.