A _____ is characterized by a pile of material on the skin surface or a depression in the skin surface.

A secondary skin lesion is defined as a change that occurs in a primary lesion due to various factors such as infection, scratching, or other alterations that may lead to additional skin characteristics. These lesions can appear as a pile of material on the surface, such as crusts or scales, or they can be depressions in the skin, like ulcers or fissures. This classification helps in understanding the evolution of skin conditions and their management because secondary lesions typically develop from pre-existing primary lesions.

Primary skin lesions, on the other hand, are the initial changes in the skin that arise as part of a disease process, such as macules or papules, which do not yet exhibit changes caused by external factors. Common skin conditions refer more generally to frequently occurring skin issues, while dermatological disorders encompass a broader range of skin-related diseases and conditions without specifically categorizing them into primary or secondary types. Thus, recognizing secondary lesions is crucial for effective diagnosis and treatment in cosmetology and dermatology.