DD was born with cleft lip and palate and a heart defect (among other things). She's also tube fed and had an Ng til 17 months when the peg was fitted.
Because of the heart condition she had to have her heart surgery before the cleft surgeons would touch her, and had to put on enough weight before the heart surgery, so until the age of about a year she had a large cleft lip and the Ng tube - cleft surgery is usually done early so it's unusual to see a child of that age with an unrepaired cleft in this country.
Generally people were lovely, and I strangely quite enjoyed explaining to children who are just naturally curious. We still get an occasional 'what's wrong with her?', and those people get an eye roll and are then ignored. The people who just stared, I used to smile merrily at, and say 'yes, she's absolutely beautiful isn't she?'. Because she was (and is).
One very serious eight year old once asked (very politely) about DD and listened to my explanation, then thought about it and said 'she does look different. No-one else here has such a lovely smile', which kept me going for a good six months.
Educating people is a good thing to do if you've the energy, but it's not actually your job and you mustn't feel bad if you just don't feel up to doing that at any particular time.
DDs scars don't get much air time as they're usually under her clothes, but I am totally nicking the 'wrestled a shark' line should we ever need it.