it happened quite suddenly 3 weeks ago, after bad flu, my toddler (2years&4months) just won't put any weight onto her left foot and has gone back to crawling. after 6 hospital visits, xrays and ultrasound scan they can find no cause or reason for it and have referred her for physio. ive read abour sever's disease but this seems to affect older children and teens. please if anyone has any ideas or suggestions even the smallest thought would be appreciated.