Tonight, my mother dreamed that someone scolded me, and then it happened in reality. Why?

It's just a coincidence. Your mother is probably in a bad mood and upset recently. What's on her mind will inevitably lead to disputes with others. And she must have had an argument with others in recent days, and she may have been persuaded by others. There was no quarrel, but she was very upset. Besides, no one will be good friends with everyone, and there will inevitably be people who can't handle it. However, your mother cares more about you and is afraid that you will be bullied by others. This is normal at best.