I'm 37, have had a swollen left groin lymph node for 2 months. In the last week it doubled in size, and the skin around it has become very tender (when I touch it directly, it does not hurt). I had a very large mole removed from my right leg a few years ago (4 surgeries to remove it & a lot of bed rest) because of a melanoma scare. It did begin to grow back & they removed that, as well. There is no sign of it on my leg. Is it possible to get melanoma, without any signs on the skin/mole itself? I've read that this could be a cause for swollen groin lymph nodes.