Probably worrying over nothing but ...
Dd was playing with her friend on the way home from school and they were watching a man with a kite. I was chatting to dd's friend's mum when dd walked up screaming and clutching the side of her neck. She sat on the floor, refused to walk, screamed all the way home (I carried her) (literally shrieking - I've only heard her in pain like this once before when she had horrible chickenpox on her genitals). I lay her on the bed, gave her Nurofen and put a hot water bottle under her neck. She stayed really still, not speaking and every time she moved she screeched in pain.
Anyhow when the Nurofen began to work I moved her to the sofa and she did manage to get up and wander round a bit when dp got home from work but she ended the day flat on her back on the bed again, screaming with each movement.
She has no idea if she did something like move strangely or suddenly when the pain started. She didn't get hit on the head or anything. She says it just started.
My gut instinct says she's pulled or twisted a muscle in her neck but the fact she says the pain also goes up over her ear and into her head makes me wonder.
She was literally fine before it happened, not even a sniffle.
I called the GP (he's a crumbly old git) who said that basically unless she's lying on the sofa completely unable to move for 5 hours in a row I shouldn't worry!