What would cause a lump to appear on the left side of neck and causes hurt?

There are many potential causes for a lump to appear on the left side of neck that causes hurt. Some of the more common causes include:

* Swollen lymph nodes: Lymph nodes are small, bean-shaped structures that help fight infection. When they become swollen, they can be felt as lumps under the skin. Swollen lymph nodes can be caused by a variety of conditions, including infections, cancer, and immune system disorders.

* Thyroid nodules: The thyroid is a small gland located in the front of the neck. Nodules are growths that can develop on the thyroid gland. Most thyroid nodules are benign (non-cancerous), but some can be cancerous.

* Parathyroid tumors: The parathyroid glands are four small glands located behind the thyroid gland. Parathyroid tumors can cause a variety of symptoms, including lumps in the neck, hoarseness, and difficulty swallowing.

* Carotid artery aneurysm: A carotid artery aneurysm is a bulge in the carotid artery, which is the main artery that supplies blood to the brain. Carotid artery aneurysms can be life-threatening if they rupture.

* Cancer: Cancer of the neck can also cause a lump to appear on the left side of the neck. Cancers that can cause neck lumps include lymphoma, leukemia, and head and neck cancers.

If you have a lump on the left side of your neck and are experiencing hurt, it is important to see a doctor to determine the cause. The doctor may order tests such as a blood test, ultrasound, or biopsy to diagnose the condition. Treatment will depend on the underlying cause of the lump.