What is the lump on my neck inside of jaw?

There are several potential causes for a lump on your neck inside of your jaw. Some possible causes include:

- Swollen lymph nodes/lymph gland: Lymph nodes are small, round structures that are part of the body's immune system. They can swell in response to infection, inflammation, or cancer.

- Sialadenitis: This is an inflammation of the salivary glands, which can lead to swelling, pain, and redness. It can be caused by a bacterial or viral infection, or by an autoimmune disorder.

- Abscessed tooth: An abscessed tooth is a dental infection that has spread to the surrounding tissue. It can cause swelling, pain, and fever.

- TMJ syndrome (temporomandibular joint syndrome): This is a condition that affects the joint that connects the lower jaw to the skull. It can cause pain, clicking or popping sounds when opening or closing the mouth, and swelling.

- Lipoma: A lipoma is a non-cancerous growth of fatty tissue that can occur anywhere on the body, including the neck.

- Cancer: In rare cases, a lump on the neck inside of the jaw can be a sign of cancer, such as lymphoma, leukemia, or metastatic cancer.

It's important to see a doctor if you're concerned about a lump on your neck inside of your jaw, especially if it's accompanied by any other symptoms, such as pain, swelling, or difficulty swallowing. Your doctor will be able to perform an examination and order any necessary tests to determine the cause of the lump and recommend appropriate treatment.