Hi there. My DS (6yrs) has had them on and off since he was nearly 4 - mainly excessive, excessive blinking. Lovely paediatric opthalmologist said nothing wrong with eyes, probably a behavioural thing...and my heart sank, as his cousin (male) had terrible twitches age 5-10 ish.
However, she said to just accept it as 'his thing', like having to wear glasses, and if that is how you explain it to other children, they often shrug and accept...and that children often do grow out of it.
It still does come and go, less frequently, and we (parents and GP) think it is a mixture of (1) nervous tic when he's a bit stressed (2) allergies (3) learned behaviour, i.e. once he starts blinking it becomes a habit, and he finds it hard to not do it.
I had been worried as his cousin had a lot of tics - rubbing face, facial spasms etc... but actually, now cousin is 15, they have all gone...
Sorry, don't think I've really helped, bit of a brain dump as I've got to rush out... just wanted to say, yes, I'v got shared experience... no real advice, except I think if it really concerns you/ your child, I would pursue...even if comes down to a professional being able to give your child some relaxing techniques, in case it is stress -related. I was very very upset when the GP said DS seemed stressed...but I think they mean what my mum would describe as 'highly strung'.
I found our GP practice's speech therapist the most sympathetic/ down to earth. The GPs I've seen (we have mega practice, so a different one every time) are either dismissive or the other extreme!
Best wishes to you all