A bulging hard lump below the jawline may be caused by the presence of a subcutaneous cyst, enlarged lymph nodes, gingivitis, or a tumor.
1. Subcutaneous cysts: When subcutaneous cysts are present in the jaw, a bulging lump may appear.
2. Enlarged lymph nodes: When there is inflammation of the jaw tissues, it may cause enlargement of the surrounding lymph nodes, which manifests as a hard lump under the jaw line.
3. Gingivitis: when there is inflammation of the gums of the lower teeth, there will be redness and swelling of the jaw, which may be manifested as a hard lump under the jaw line.
4. Tumor: when there is a primary tumor in the patient’s body, when the tumor metastasizes to the jaw, there will be a hard lump under the jaw line.
A bulging lump under the jaw line may also be other diseases, which should be examined in the hospital and treated as soon as possible after the cause of the disease is clarified.