I have a 2.5-year daughter. She started walking after 1 year. When she is playing or walking, we notice that some times she lifts her left leg and starts crying and after a few moments she is fine. This happens randomly some days (2 -3 times a day) and not always. Last week she had a viral fever and during that period this problem was repeating more frequently, say every 20-30 mins. We had consulted doctor many times. Initially, they thought it was due to irregular motions but these days her stomach is also fine she has also been given all vaccinations on time. Her vitamin d3 test shoes the level at 17 ng/ml a year back. What could be the reason for her problem? Is it due to d3 inefficiency or something else. Please guide us.