Brief Answer: Please, get this leg examined! Detailed Answer: Hi and thank you so much for this query. I am so sorry to hear about what your daughter is experiencing with her knee. I will consider this limb to have an abnormality until otherwise proven. I will suggest that you get her consulted and examined by her pediatrician. depending on the findings, a baseline Xray alongside other laboratory tests would be ordered to understand the exact cause of this problem. If at the end of the day no problem is identified, then we would all be happy and reassured buy cannot ignore this from the outskirt without addressing it fully at this time. This is no growing pains. It progressive worsening and refusal to bear weight on it alongside adopting an analgesic position is no common thing in kids growing up. I hope you understand my worries and the need to get her fully evaluated. I wish you well and wish her the best of possible outcomes. Thanks or using our services and feel free to ask for more information and clarification if need be. Dr. Ivo, MD.