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 Scalp skin conditions or even head lice may cause the lymph glands at the back of the head to swell. 2  Skin infections of the arm may cause lymph glands in the armpit to swell. 3  Infections of the leg or genitals, or nappy rash, may cause lymph glands in the groin to swell.