Substance abuse is using drugs or alcohol in a way that hurts your body or your life. It's like eating too much candy, but many times more serious. Some people use drugs or alcohol because they feel sad, angry, or anxious. But drugs and alcohol can make these feelings worse, not better. They can also make you act strange or dangerous, like a villain in a cartoon. That's why it's important to not use drugs or alcohol until you are an adult and to always listen to your parents or caregivers about how to take care of yourself.