It started suddenly after her first day back at school (after a virus) last monday. It's worse in the mornings and it's hard for her to get up and down stairs.
I am wondering if it's related to growing? Last year she had iliotibial band problems, in her right hip, inflammation for 3 months. She has slight pronation in her right leg, it turns in.
Googling has found Osgood Shlatters disease, but she has no lump, and isn't an active sporty child.
I just hope it will go away.