When I extend my knee joint, the proximal fibular head seems to be jutting out on the lateral side. When I bend my knee, the fibular head still sticks out, but I am able to pull it in as to hide it. Pulling it in is easier when I laterally rotate my leg. Similarly, I am able to voluntarily stick the fibular head out more. This becomes easier to do when I medially rotate my leg. When I move my fibula inward, the tibia rotates normally as well, as it should. I have this problem on both legs, without pain, and my legs started looking like this as I was growing up. My feet are naturally very slightly inverted (I don't know if that's normal). But I wanted to know why my legs look like this. I am a skinny person, but even then, the fibular head shouldn't be this prominent.