DDH is a bone illness that has something to do with the pelvis. It is were your top leg bone comes out of its socket or you are born with it. A boy that is in year2, was born with it witch means he is only 6 or 7 and he has had over 4 major operations. There is a website were you can find out more and it is called 'Spica warrior'. It was a website set up by a the mum of the 7 year old so pe have Dople can understand how it feels to have DDH