causes of inflamed lymph nodes
1 Glands in the armpit (axillary lymph nodes) may swell from an injury or infection to the arm or hand. 2  A rare cause of axillary swelling may be breast cancer or lymphoma. 3  The lymph nodes in the groin (femoral or inguinal lymph nodes) may swell from an injury or infection in the foot, leg, groin, or genitals.