6 year old crying all the time

[Anomaly]

My DS2 aged 6 cries all the time. Every time something doesn't go quite his way and he just cries as if you just cut off his arm. It is ridiculously stressful as it happens multiple times a day. He's cried already three times already today. I have two other children and inevitably they wind each other up but its never a little issue everything involves sobbing his heart out. If he does actually hurt himself he'll scream even if its just a small bump and his crying is completely out of proportion.

Any ideas? I can feel myself on edge just waiting for the next lot of crying.

My daughter was a bit like this, although strangely, not so bad if it was a physical thing, but ridiculously over-dramatic if she was slightly told off, or if something went wrong. I dread to think what she would have been like if there had been siblings in the mix as well. Does he do it at school as well or just at home? And what's his position in the family? Ultimately, I guess he does it for attention, so if at all possible, I would try to give him more attention. Not in response to the crying jags (I would be very low key, matter of fact and start talking about a sense of perspective about those) but at other times when he's calm.

Some hope for the future though: my daughter got past that phase fairly quickly and now, at 11, she found herself telling a school friend who was over-reacting to something that it was important to find a sense of perspective.

DS is a little bit like this
I read him the boy who cried wolf and we talked a lot about how if he screams and cries over every tiny thing, when it is a serious thing Mummy won't know and won't react fast enough/help/even care very much
It helped quite a lot actually, sometimes now he'll put on his crying face over something minor then catch himself and snap himself out of it...most of the time