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.
Swollen lymph nodes in the groin may cause pain when walking or bending. Other symptoms that may be present along with swollen lymph nodes are: coughing; fatigue; fever; chills; runny nose; sweating; If you experience any of these symptoms, or if you have painful swollen lymph nodes and no other symptoms, consult your doctor. Lymph nodes that are swollen but not tender can be signs of a serious problem, such as cancer.