Groin lymph node swelling syndrome is an inflammatory condition of the lymph nodes in the groin region, commonly caused by sexually transmitted infections.

Lymph nodes are part of the body's immune system, acting as filters that remove potentially harmful substances from the body. Swollen lymph nodes in the armpit can be a sign of infection or injury. In particular, swollen lymph nodes after plucking armpit hair is a risk factor for local infection. One should not dismiss and overlook other causes of swollen lymph nodes.