A nodule is classified as which type of lesion?

A nodule is classified as a primary lesion because it is a solid, elevated area of tissue that can form as a result of various factors such as inflammation, infection, or abnormal cell growth. Primary lesions are those that develop as a direct result of a disease process, particularly affecting the skin. They appear at the site of the primary disease, which is consistent with the definition of nodules.

Nodules are generally larger than papules and can vary in depth, being encapsulated within the skin. Understanding that nodules are a type of primary lesion helps in recognizing their role in various skin conditions and aids in the appropriate assessment and treatment by skincare professionals. This classification also distinguishes them from secondary lesions, which arise from primary lesions due to changes over time, and highlights the importance of identifying the type of skin lesion during a clinical evaluation.