What term describes a secondary lesion that manifests as a deep crack penetrating the dermis, often due to environmental exposure?

The term "fissure" accurately describes a secondary lesion characterized by a deep crack that penetrates the dermis. Fissures often occur as a result of environmental factors, such as excessive dryness or irritation, leading to skin breaking and creating a vertical split. This type of lesion can be quite painful and is typically found in areas where the skin is subject to significant movement or stress, such as the hands or feet.

Fissures are distinguishable from other types of lesions as they have a clear edge and depth, penetrating beyond the epidermis and affecting the dermal layer. This condition is often exacerbated by hydration issues or conditions that result in skin tightening. Understanding this term is critical in the context of esthetics and dermatological health, as it provides insight into the skin's response to various environmental challenges.