A five-year-old nine-month-old boy has been diagnosed with ADHD and recently has shown abnormal behaviors such as eating paper, prompting parents to seek professional advice.

Children start spitting at people from the age of three, accompanied by symptoms such as inattention and verbal violence. What could be the issues, and how should they be treated?

Understanding the symptoms of phenylketonuria, including delayed intellectual development, seizures, and abnormal behavior, as well as parental concerns about genetic risks and early identification in newborns.