Name changed as I know I'm going to get flamed.
I have 2 kids, 4&7. Both lovely kids in the main. Eldest is kind, caring, not a mean bone in his body BUT he's a screamer. That eat piercing shriek noise that goes through you like nails on a blackboard. He's pretty much always gone it - it's not in response to something in particular, he does it when playing alone. He isn't doing it deliberately, he hates getting in trouble or thinking he's done wrong, he's quite anxious.
Youngest is not a screamer. Behaviour-wise, she's more likely to be defiant and doesn't mind getting in trouble if she thinks the reason is justified. She shouts when angry, but it isn't a shriek. She's also brave and funny and independent.
Why is DS a shrill screamer? DH and I aren't, we've tried a number of strategies to stop it (used consistently before moving on to another strategy) and it persists. At one point I felt I was just constantly discipling him, it was really sad and made no difference to the shrieking.
AIBU to ask for ways to stop him going it? Or will he eventually grow out of it?