My 10 year old daughter went to school yesterday and felt sick and vomited mid morning. she went home and slept most of the day and through the night. she stayed home from school today and said she has felt fine all day. Tonight I was giving her a light back massage as I normally do before bedtime. I noticed that the Right side of her lower back was swollen and tight. She is active and plays basketball and could strech more to help out with flexability so her low back is always a little tight but I have not seen it this swollen before. She said it did not hurt when I pressed on it but saw her flinch a few times when I would press my thum close to the spine on the right side only.( Swollen area.) Any advise would be greatly appreciated.