Radiation therapy uses high-energy radiation to shrink tumors and kill cancer cells (1). X-rays, gamma rays, and charged particles are types of radiation used for cancer treatment.
1 Lymph nodes of the armpit and neck may also be involved. 2  Viral infections such as infectious mononucleosis may affect the whole body and cause generalized lymph node swelling in various parts of the body, such as neck, armpit or groin.
1 Cold and sinus infection can also cause swollen lymph node in front of the ear. 2  Infection in the forehead, such as a boil or an infection in the upper eye lid, as in the case of a Stye can cause swollen lymph node in front of the ear.auses of Swollen Lymph Nodes. 1  An infection on the Pinna of the ear due to ear piercing can be a cause of swollen lymph node in front of the ear. 2  Sometimes, the salivary glands present in front of the ear get swollen.