Hot sausage lips

I received a phone call from Charlotte's school on Wednesday morning informing me that her teeth cut her lip from an accident in the school playground. I asked the teacher is it was serious. She told me the bleeding has stopped after they apply ice. Furthermore, Charlotte told teacher she was not in pain. From our phone conversation I gather that it was not very serious, thus I did not pick her up from school immediately.

However, when we fetched her from school that evening, I got a shocked to see this:

The cut is really bad. We brought her to see the doctor immediately and the doctor says the injury is on the surface thus it was not so bad. There are cases where kids teeth actually cut through the lip. Sound damm scary. I felt so bad for not picking her up from school when teacher called that morning. That evening I cut her food into small bite size so that it won't touch her wound on the lip. I asked her if the teachers help her with lunch and bathing she answer no. I ask her how she eat her lunch in school with this swollen lip, she answered, "use the other side". OMG. ... She is quite hardy... maybe also because we normally don't "yang o" her from falls and knocks since young. But it does pain our hearts to see her swollen lips. However, it is common for kids to get injured during play, the only way we can protect them is to train them and we told her to be careful during play and no more running so close to her friends in the playground. The accident happen when they were running in the playground and her friend stop out of the sudden and she jammed right into her friend. I would not teach her to "stop" running as it is part of growing up. I also do not wish to make her into the small flower who grow inside the green house.