He's hitting himself in the face...!?!?!

[belfie]

Over the last few days, DS keeps hitting himself in the face repeatedly (with right hand only). He then looks rather unhappy cos he keeps getting biffed! Is there any reason he might be doing this? Or would it be a "I can't control my arms that well" kinda thing?

Otherwise he's not too different to usual, so I'm assuming nothing major is bothering him (except the heat down here maybe!!!)... but I just don't like seeing it. It just seems as though something is annoying him... or itching or hurting maybe?? My DH thought he was trying to indicate he wants milk, but he's still doing it even when feeding sometimes.

Anyone else had this?

TIA,
Belfie
ETA: he is an "itchy" type with eczema and is usually in mittens... so could be frustrated scratching...