Your ingunial lymph node is located in your top, inner leg (>V (the 'V' is the shape of your outer genitals, and the '>' would be right around where your lymph node is, in the inner leg, on both sides)) I hoped that help, I tried.
Lymph nodes are part of the immune system, and if its swollen, it's fighting of an infection. Whether its bacterial or viral. It can also be some kinds of cancer. If it comes and goes, your body is most likely fighting an infection, if you notice its swollen all the time, talk to your doctor, especially if you have had family diagnosed with cancer.