DS is 16mo and has been going to Nursery since Christmas. He's been injured a few times since starting (bashed face into railings when he was learning to walk, fell off a chair... Er, some other things that I can't now remember) but it's been happening with more frequency over the past few months.
The last two incidents, which have happened within 5 weeks of each other, have concerned DS being bitten by another child on the face. The last time it didn't look too bad but today his left cheek is enormously swollen and he has a huge red mark with clear teeth marks 
T'was a different child who did it (no idea who, but I asked was it the same child as last time and they said no) but they did it for the same reason - DS, who is unsteady on his feet still, had used their hair to pull himself up to standing. Said child, objecting to being used as a bannister, bit him.
Now I'm not a nightmare parent, promise I'm not. I smiled, said kids will be kids, signed the accident form and reasoned with myself that my child should not be yanking on people's hair and perhaps eventually this will get through to him... Hopefully while he still has some face left.
But his cheek is so swollen. It's making me feel so guilty that I am sending him somewhere where he is getting hurt like this. I mean, he could just as easily bash his head into a fence when he's out with me, but he damn well wouldn't get bitten.
Nursery, by the way, are fabulous and wonderful and I love them there - no complaints whatsoever. DS seems to love it too, never cares when I drop him off and doesn't want to leave when I go and pick him up.
So I suppose my AIBU is really - It's normal, right, for kids to get injured at nurseries? And - Withdrawing him from nursery because of stuff like this would make me Queen PFB, wouldn't it?
Someone give me a slap, I keep looking at his little face and wanting to weep