Hello, my little girl is 3 and 9 months. For the past 2/3 months she has had pain in her legs, mostly left leg and from what I can gather it's behind the knees, calf and ankle. She is sometimes In tears and has woken her in the night before, sometimes unable to weight bear.It does pass after roughly 20-30 mins. Now she is complaining of pins and needles, again in the left leg. Any suggestions? She eats a varied diet and is active- fit and healthy.