well as to getting her to blow her nose, that can be difficult because it is hard to teach. you could tell her to hold her mouth shut and act like she is going to blow air out her mouth, but not to open her mouth, eventually since it is all connected the air will move up into her sinus' and she will blow her nose, she may also being so plugged up not be able to blow her nose, there may be no room for air up there. I would get some saline solution, they make some specifically for children, and squart, drip some up her nose as often as she needs it, the salt will help break that up and it will flow out of her nose and it will help moisturize her nasal cavity so she at least won't have nose bleeds due to it being dry and irritated. As to the nosebleeds, there is definitely a problem. If she says that her nose hurts, then there could have been some cartilage knocked lose and that would need to be removed. I know there is a treatment where the doctor goes in and basically burns the nasal passage, and this cuts off the capillaries that cause it to bleed, this may be an option for her and you might want to talk to the doctor about this. But you need to demand for someone to find out what is causing the nosebleeds, when her nose is tapped and starts bleeding that is a problem, it is not just from being too dry there is something wrong. Demand answers.