They are specialized masses of tissue that filter lymph before returning it to the blood.
They are present along the lymphatic system pathways.
They are present throughout the body.
Lymph nodes that undergo frequent swelling are present in the head and neck region.
However, lymph nodes are present in the groin and armpits area.
According to recent studies, lack of sleep may have a differential effect on the spleen and mesenteric lymph nodes, but these are not the primary factors causing lymph nodes.
The primary reason for the swelling of lymph nodes is a bacterial or viral infection.