My son is 2 and is the KING of bumping his head, I have called the dr so many times I swear..... The dr always tells me that he is ok and to just keep an eye on him as long as he did not loose consciousness and is not vomiting. Dont let her go to sleep right away after either. Just try and put an ice pack on it as long as you can (i know its hard with a 2 yr old) and keep an eye on her to make sure she is not lethargic or vomiting. Hope she feels better!
i think it is better to check with her doctor,to make sure she is ok, ice bag owrapped in wash cloth is another solution in a mean time :)
use a ice pack bag or a bag of frozen vegetables wrapped in a wash cloth so it not too cold for about 20 minutes every 3 to 4 hours if its bleeding wash it with warm water and apply pressure for a few minutes it should stop bleeding i give my kids a ice pop to distract them while i'm doing it she'll need some tylenol or something like that she'll have a headache its best for her to do quiet activities for a while so she doesn't make her headache worse and you should watch for throwing up ,changes in her speech or coordination or if she gets lethargic or just doesn't look right for the next 24 hours and if she goes to sleep soon make sure you check on her a few times to see if she's sleeping normally and her color and breathing is good you can call your doctor since she's so young they may want to look at her