A full body skin check is a comprehensive examination performed by a healthcare professional, to assess the skin for any abnormal growths, changes, or signs of skin conditions, particularly skin cancer. It’s a preventive and diagnostic procedure that aims to detect skin cancer early, especially melanoma, which can be more treatable if caught in its early stages. You will be asked to remove all clothing, leaving only undergarments (or be fully undressed, depending on the context), to ensure the professional can thoroughly examine the entire skin surface.