There are many reasons for jaw swelling and pain, such as trauma, submandibular gap infection, dental disease, lymphadenitis, mumps and other diseases.
1. Trauma: Localized stimuli such as extrusion, collision and car accident may cause jaw swelling and pain.
2. Infection of submandibular space: Secondary bacterial infection of submandibular space will cause local skin congestion, swelling and obvious tenderness, resulting in jaw swelling and pain.
3. Dental diseases: such as pulpitis, gingivitis, apical periodontitis, wisdom tooth pericoronitis and other dental diseases, can also lead to jaw swelling and pain.
4. Lymphadenitis: Infection of submandibular lymph nodes may cause painful enlargement of lymph nodes, which may also lead to jaw swelling and pain.
5. Mumps: Bacterial or viral infections that cause mumps can also lead to jaw swelling and pain.
There may be other reasons for jaw pain and swelling, so you need to go to the hospital for examination to clarify the cause.