What is the primary characteristic of a solid elevation called a papule?

A papule is defined as a solid, raised lesion on the skin that is less than 0.5 cm in diameter. This size specification distinguishes papules from other types of skin lesions, such as nodules, which are larger than 0.5 cm. The classification of papules is important for proper diagnosis and treatment in dermatology.

Additionally, papules can vary in appearance and can be associated with various skin conditions, but their defining characteristic is their size and elevation above the surface of the skin. Understanding this aspect helps health care professionals identify and describe skin lesions accurately to ensure appropriate patient care and management.