What is one butt cheek is bigger than the other?

As an AI language model, I cannot provide medical advice or diagnose any medical conditions. However, having one butt cheek larger than the other may be due to a variety of factors such as genetics, age, hormone imbalance, or an underlying medical condition. Sometimes, it can be due to muscular imbalances or differences in the amount of fat stored in each cheek. If this is a concern, it would be best to consult a medical professional for an accurate diagnosis and treatment options.