Which term refers to the sensation of itchiness?

The term that refers to the sensation of itchiness is pruritus. This term specifically describes the uncomfortable feeling that causes the urge to scratch the skin. Itchiness can result from various causes, including skin conditions, allergies, infections, or systemic diseases. Pruritus plays a crucial role in dermatology and general medicine because it can significantly affect a person's quality of life and often indicates an underlying condition that may need to be addressed. Understanding pruritus as a symptom allows healthcare providers to better diagnose and treat the root causes behind the itch.

The other terms listed refer to different conditions or symptoms and do not specifically denote the sensation of itchiness. For example, dermatitis is a general term for skin inflammation, urticaria refers to hives, characterized by raised welts on the skin often accompanied by itching, and excoriation is the act of scratching the skin, which may result from or lead to pruritus.