There's an American saying that shouting at your children to obey is like using the horn to steer your car - and it produces the same results. The triggers are many and various, but maternal isolation and exhaustion come high on the list. And I often shout at my daughter when I'm angry with myself. Almost all shouters feel guilty. I've concluded that there are shouty families, and non-shouty ones.
Family life is such a cauldron of emotions.
Shouting at kids is often bracketed with smacking them, but for many of us it's an alternative. It's partly a matter of degree and ratio. The age of the child and what you actually say is also important. With a teenager, that's not the case. Though many of us worry that shouting at our children will damage not just their brains but their wellbeing, most children quickly become desensitised to loud parents and tune out.