Yelling isn’t only bad for those who do it, but also for those who receive it, and the damage can start from a very young age. Shouting at kids can harm them in multiple ways.Their behavior problems can get worse. Some research found that parents who yelled a lot at their 13-year-old kids noticed even worse behavior during the next year of their lives.Their brain development changes. People who have been yelled at a lot during their childhood seem to have a different brain structure in the parts that process sound and language.