Anyone know what this is? Is it pregnancy related?

its on the back of my leg below the back of my knee and keeps appearing then goes for a few days xx

@firsttimemummy21 Is it blood/bruising? xx

Seems a bit like a bruise, its definitely under the skin xx @winterbaby95

@firsttimemummy21 It could be iron related hun :) I would bring it up with your midwife :) Can't think what else may be causing it xx

Okay thanks :) @winterbaby95