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What is a pustule characterized by?

  1. It is a solid mass

  2. It contains pus

  3. It is a flat surface with raised edges

  4. It has a stalk-like base

The correct answer is: It contains pus

A pustule is characterized by containing pus. This defining feature distinguishes pustules from other types of skin lesions. Pustules are small, elevated, and often red bumps on the skin that are filled with a thick fluid composed of white blood cells, debris, and bacteria, giving them a yellowish or whitish appearance. This characteristic is important in both clinical diagnosis and treatment of various skin conditions such as acne, folliculitis, and infections. Understanding what a pustule is aids in recognizing its significance in dermatology and dentistry, as they may indicate localized infections or inflammatory responses.