What causes a dent in a butt check?

A dent in the butt cheek can be caused by several factors, including muscle atrophy, fat loss, or injury. Conditions like sciatica or certain muscular imbalances can also lead to changes in muscle tone and shape. Additionally, localized trauma or repetitive pressure may create a dent or indentation in the tissue. If the change is sudden or accompanied by pain, it's advisable to consult a healthcare professional.