8yo dd complained a few weeks ago that she had a bruise on her inner thigh. She said she couldn't remember how she did it. It looked very much like a mark made by her little brother pinching her which on occasion, when frustrated, he does. He also tends to aim for her thigh or the tops of her arms. She's also as active as most 8yos and rides her scooter everywhere, occasionally crashing and bruising her legs. I put it down to that.
A week ago she mentioned it was still there and I had a good look and it had faded to a browny colour but I could feel a lump directly underneath it. Around the size of a pea. She said it was sore.
A week later and it's still there, same size, sort of a reddy colour but she says it's more sore than it was. She does admit though that she squeezes it because there's a lump underneath it and it 'feels funny'. I don't know if that's exacerbating things.
I have a terrible health anxiety, particularly where the dc are concerned and I am jumping to the absolute worst conclusions. Because that helps, obviously. 
She's not ill, not tired or not herself. She's perfectly well. She's also had other run of the mill, fell off her scooter or got whacked with a golf club bruises in the last couple of weeks and they've cleared up within a couple of days. It's just this bruise on her thigh.
I've made a GP appointment for after school today as it's preying on my mind but is there a chance this is absolutely nothing and my sky high anxiety and terror is unnecessary? I need to stop googling.