5 month old baby shakes head lots....any ideas?

[pucca]

My 5 month old ds has started to shake his head quite vigorously (as if to say no iykwim) and at first i thought it was cute and funny but now it is worrying me and thinking awful things like what if something is seriously wrong (i.e mentaly)

He has just been doing it now in his sleep, really weird. He isn't ill or anything but posted this in health as didnt know where else to put it...can anyone help?

TIA

Please...anyone?

I am knackered but think i am gonna be laying in bed worrying about this now.

i know my 7 month old shakes when hes excited. could that be it?

My DS did this from pretty early on and still does it now (14 months) I'm not sure if he ever did it in his sleep though.

When he does it now he is normally sitting in his high chair and I always think he must feel sick afterwards or have a headache he does it so quick, but he loves when he stops he starts giggling like mad.

Have just searched threads and found lots of threads on this so feel better now

He is teething like a maniac atm, and it is like when they try to rub their gums on your chin iykwim, but yes he does it and smiles...just really weird.

Thanks for replying everyone

He just did it then in his cot, was just about to collapse into bed and then thought...i know will go and ask on mumsnet! lol