Bee was 3 weeks old when she had her first stroke, had glasses before she was 6 months old, splints on both legs and one hand by the time she was 13 months. It kind of "said" itself.
I will be honest - the phrase "what is wrong with her" is not one I love for Bee... for several reasons. 1) it is not a simple answer. She has several rare conditions (mitochondrial encephalomyopathy, mastocytosis, epileptic encephalopathy, Fanconi syndrome, idiopathic coagulopathy, infantile ischemic stroke, myelodysplastic syndrome and so on...) but while all the medical professionals believe they are related, no one has been able to tell us how; 2) nothing is "wrong with her". She is different, but not defective, if you know what I mean. Bee is acutely aware that she is different from the kids who live in our area, but for now, she doesn't really care. I don't want her equating her differences with being somehow wrong or bad; and 3) if it is really their business, they will likely already know, I will have volunteered it - if it isn't, then why are they asking in the first place?
There is an unspoken rule within our little "community" that you just don't ask. Bee is a Special Olympian - aside from the athletes who have syndromes with characteristic facial features, I don't know what the diagnoses of the other athletes on her team are. I don't need to know, and don't ask. On her baseball team, same thing. Sometimes, while the players are on the field or in the dugout with their buddies, parents talk. We all "get it" and usually, if you want to know, you'll ask "what is your DC's primary diagnosis?". When we talk like that, it is usually to see if we share common physicians, or have equipment that can be shared if we no longer need it, or to talk about school accommodations.
You'll find what is the right thing to say for you, and frankly... who to say it TO. Not everyone needs to know, and you don't owe anyone an explanation. Before too long, you will be inundated by well meaning (and not so well meaning) people who will think it is their place to offer you unsolicited advice. You are not obligated to follow it, or even listen to it. You'll also start hearing what an angel you are, how amazing and strong. Be careful not to let people put you on a pedestal - all that means is that when you fall, it'll be a longer fall and a harder landing.
Welcome to the journey - it's a wild one.