I recently spoke to my HV about dd2's anger, (she is 3.10). They were quite helpful with tips about ways to deal with the anger, some of which has helped. But they admitted that a lot of it is something she will have to grow out of, and in the meantime I have had to change a lot of things about our day to day in order to avoid the huge explosions. They did say that if things didn't improve the gp could refer her to a child psychologist.
It is difficult to explain to someone just how awful the explosions can be, and how difficult they are to deal with.
I can see a lot of the reasons for dds emotional state at the moment (moved house, arrival of a sibling, started preschool etc), but knowing why, didn't seem to be able to help deal with it.
The HV said she seemed extremely bright, and has a very vivid imagination, which I think leads her to get quite fearful, and this leads to the angry outbursts. Another way her insecurities come out is through her speech, she has an amazing vocabulary, but has a stammer, which seems to get worse when she is feeling unsettled.
The things that have made the biggest difference are,
1)trying to avoid situations where the worst meltdowns happen
2)ignoring as much as possible (difficult when she is trying to run out into the road)
3)creating a 'calm down area', so that when she is starting to flip, she gets sent to the 'calm down sofa' (I am thinking of getting a little tent!) where she grabs a teddy, buries herself in blankets and I walk away to stick my head in a cupboard and scream