DD#2 has a vascular malformation called CMTC. Its caused her right let from her toes to the top of her bum are covered in very dark purple vains. She was born with them. Her right leg is also noticable smaller then her left, both in muscle mass and in length (LLD) so all her life we've had comments.
CAS has been called 5 time on us because it looks like really bad bruises. We've also gotten the strange looks if she wears shorts or a dress without tights.
We got comments all the time at the hospital when she was born too. From the midwife, OB's, and nurses.
When she was 3 months old she got an ultrasound on the leg to ensure the bloodflow itself was ok. We had 3 nurses and 2 doctors in questioning me about the "buises"
I've learned to always carry around an information package about her condition no matter where we go.
Honestly its annoying, and its hurtful at times, especially when people think we've hurt her

but we've decided to take the "high road" we're polite, and we say what it is and leave it at that.
I don't want this to effect her in a negative way. I want her to love who she is and except that this is part of who she is and that there is nothing wrong with her.
Her sister who is 4.5 even knows what to say. She also makes sure the other kids leave her alone.
In my opinion its about how WE react as parent not how strangers react thats importent. Teaching them that its ok to be different, and its ok if someone asks, that we just answer. That most are not trying to be rude, mean, or hurtfull, but trully don't understand.
We use it to teach our girls more about tolernce and acceptence.