My DS is 4 in July - he's just developed a nervous habit of scrunching up his nose as if something's annoying him inside and also opening his mouth wide as if to crack his jaw. We've just been away on holiday for 2 weeks and I noticed it becoming more of a habit over that period . He's gone back to nursery today and I mentioned it quietly to them to see if they thought it had become more obvious and his keyworker. when I went to get him tonight, said she noticed it too.
He is an odd mix of being quite sensitive and unsure of himself but also confident and outgoing making friends easily. He starts school in September and we've a lot going on at the moment so maybe it has something to do with that. His keyworker said they had a little girl who went through a phase of blinking a lot for a while and then she just stopped...
I'd be interested to hear if your lo's have developed any odd temporary habits. By the way, at the moment we're just ignoring it but as it's happening more, it's made me wonder if he's feeling ok in himself IYSWIM....He went through a phase of wanting to go for a wee every 10 minutes last year so perhaps this is a similar thing...