The ilioinguinal nerve branches off the first lumbar nerve, which is near the lower back. It branches down the body through the second and third abdominal muscles and communicates with the iliohypogastric nerve, whose main function is to regulate the diaphragm to help breathing, and the areas around it.
The ilioinguinal nerve moves further down the body, eventually branching out into the upper part of the thigh muscles. It also reaches the mons pubis and labia majora, both parts of the groin.
The symptoms in ilioinguinal neuralgia usually consist of an unpleasant painful sensation in the lower abdomen and groin, radiating to the upper inner upper leg and to the genitals. Patients complain of a severe burning and stabbing pain.