It can be hard to remain calm when addressing children's aggression, but it's important to remember to stay positive and try to deal with the situation calmly. Children pick up on everything so being aggressive with them will only make matters worse for both of you. Take a moment to breathe before diving in.
When the time is right, try talking to your child to help identify what made/makes them angry and work together to help them deal with their anger in future.
And don't forget to talk with us too! If we are all on the same page with addressing behaviour it will benefit everyone in the long run!