To be honest it feels if there is a splinter of glass or a cactus thorn. It only hurts if I brush my leg one way, or when I get in the bath and the water washes over it at a certain angle. It also hurts when I kneel down and the material of my clothes moves against it. If I move my hand over it I can occassionally catch it - not always thou!
I have searched and searched but there is no mark, the area is about an inch by an inch, so is not that huge but then not that small. I really can't remember doing anything to aggrievate it! In fact I am stumped and it has given me at least 2 wks worth of discomfort - Also would feel a right nelly if I went to GP and said "my leg hurts but there is no mark!"