Hi, I recently found red marks (this was a couple of weeks ago) and then again (the other day) semi circular bruises on the back of my 5 year old's thighs. It looks as if sitting on the toilet has bruised her - so you can imagine the placement and look of them. I cannot think of anything else that would cause such bruising. I guess she bruises somewhat easily, but not overly- we have never had any concerns. Has anyone ever encountered this? Does anyone have any other ideas? We have had no reason to consider anything 'nasty' like them having been caused by another person (other than her younger sister, but even then, I cannot think of anything a 3 year could do). Your help is appreciated!