“How can I control my child's anger?”

There are behavioral techniques one can use but also can help treat with medications.

A lot of love and support. Talk with him/her to understand the source of the anger. It wouldn't hurt to have them evaluated to see if therapy or a mental health plan can be implemented. Usually, anger in children tends to come from hurt, trauma, or feeling inadequate. Children who sometimes deal with anxiety may display it with anger because may not be able to identify their feelings like an adult.