Losing Hair on Inner Thighs

I’ve recently lost a large circle on my inner thighs. The spots are just below my inseam and are the exact same on both legs. What could this be? I’ve also been getting stabbing pains in mostly my left leg but some in my right.

I suppose it could be your thighs rubbing together or rubbing on the material of your pants, creating traction alopecia in that area. The pain might be unrelated. I’d get examined by your doctor though, as this isn’t something I could even guess on via the Internet.