How is a nodule defined?

A nodule is specifically defined as an elevated skin lesion that exceeds 1 cm in diameter. This definition is important because nodules differ from other skin conditions in size and structure. They can be formed by various types of tissue, such as inflammation, tumors, or other underlying health issues, and they often feel solid to the touch.

Understanding this definition helps in the assessment and treatment of skin lesions. For example, nodules may need closer examination or diagnostic interventions compared to smaller or flat lesions like a pimple or a flat skin discoloration. This highlights the significance of recognizing the characteristic features of different types of lesions in esthetic practices, ensuring that appropriate care is provided based on the lesion's nature and size.