Final answer:
A papule is caused by an inflammatory response, typically as a reaction to an infection, injury, or irritation. In the case of skin disorders like acne, a bacterial infection in clogged pores can trigger this kind of inflammatory response.
Step-by-step explanation:
What causes a papule? The correct answer is C) Inflammatory response. A papule is a small, raised area on the skin that can occur as part of an inflammatory response to various triggers including allergic reactions, irritation, or an underlying skin condition. The inflammatory response is a defense mechanism activated when the body detects an intrusion or injury, signaling the immune system to respond to the affected site. This can result in redness, heat, pain, and swelling. In the context of skin disorders, such as acne, clogged pores that become infected with bacteria can lead to the immune system's inflammatory response, consequently leading to the formation of papules.
Acne, for example, is caused by clogged, sebum-filled pores that provide a nurturing environment for bacterial growth. The resulting bacterial infection provokes an immune system reaction, leading to inflammation. This inflammation can cause a papule to form when it affects the outer layers of the skin, often accompanied by redness and swelling.
Moreover, certain skin lesions, including papules, can also be a concern for conditions like skin cancer, necessitating medical screening. Understanding the causes and types of skin lesions is key to proper diagnosis and treatment.