it's very common for children to have a nosebleed. I know, you can be scary looking at your child and notice he/she has a nosebleed with no apparent reason. It's a good idea to keep your child's nails short to prevent injuries from nosepicking.
What to do to stop a nosebleed:
1.have the child sit up with his/her head tilted slightly forward, but do not have a child lay back-it may cause vomiting.
2. pinch the soft part of nose for 10 minutes.
If a nosebleed continues after couple of attempts of stop it, you should call 911 or your doctor.