What distinguishes a nodule from a papule?

The distinction between a nodule and a papule primarily revolves around their depth, size, and texture. A nodule is indeed characterized by being deeper and larger than a papule. Nodules extend deeper into the skin, often forming in the subcutaneous layer, and they can be larger in diameter, typically greater than 0.5 cm. They often feel harder and can be more painful compared to papules, which are small, raised lesions that are typically less than 0.5 cm and occur primarily in the outer layer of the skin (epidermis).

Understanding the structural differences is important for accurate diagnosis and treatment in aesthetics and dermatology. Nodules often correlate with more severe conditions and require different treatment modalities compared to the typically smaller and less complex papules. Knowing these distinctions helps estheticians make informed choices regarding skin care and management of various skin conditions.