DS aged 2 and 5 months has developed a limp. No obvious trigger. Been to doctor, she referred to A&E who have referred us back to outpatients. Dr and A&E had no idea really. He appears to be in no pain, quite happy to play football, ride bike, etc etc. Severity of limp does change during the day. Any thoughts or similar experiences? If potential to be something serious would rather go private and get sorted, but if just one of those things he might grow out of don't want to. Just really sad to see him hobbling about. Have checked shoes, socks, feet and no obvious problems there. Thanks