Extremely sensitive thighs?

I have a relatively high tolerance for pain in most circumstances. However, whenever anything touches the front of my thighs, it feels extremely painful. I'm not talking about excessive pressure here; my cat rubs around them and it hurts more than the time I bit through my lip (by accident, I add - tripped over and bit it in the fall).

This isn't a recent change, but it came up in conversation and people were asking a lot of questions, which got me thinking: should I be concerned about my thighs being sensitive where nothing else particularly is? I've never have any problem with the health of my legs apart from this.