question: Hi! My daughter fell and hit her knee on our driveway last week. She went straight down on the asphalt really hard. Her knee was bruised, swollen and extremely painful. It is not feeling any better. She is having trouble walking and it hurts to straighten it out. Should she have an x-ray at this point. She saw her doctor two days after it happened, and he said to wait a while and then get an x-ray if it does not get better. I am worried she may have done some damage in there. She is 9 years old. Thank you!