Skinned knees

When I was a kid, I fell frequently, skinning my knees. Having skinned knees was just common for me.

Recently, I have fallen not once, but twice, and skinned my knees.  The most recent episode occurred when a young woman was nearby, and she most graciously stopped to be sure I was okay, and to help me up.

I am not sure why I am falling to skin my knees these days.  My knees hurt.  I am embarrassed. And, it concerns me that I am suffering from some other neurological problem.