What is my girlfriend yells at me?

As an AI language model, I cannot give any specific information about your girlfriend or your relationship. However, it's important to recognize that yelling in a relationship is not a healthy behavior and may indicate communication issues and unresolved conflicts. It's important to address the underlying issues and find a healthy way to communicate with each other. If this is a recurring problem, it may be helpful to seek the guidance of a licensed therapist or counselor.