What is a bulla?

A bulla is defined as a large blister that typically contains clear, watery fluid. It is characterized by its size, usually being larger than a vesicle, which is a smaller blister. Bullae can form due to various causes such as friction, burns, allergic reactions, or infections. Understanding the characteristics of a bulla is important in fields such as dermatology and cosmetology, as it helps professionals recognize skin conditions and proper treatment methods.

The other options describe different types of skin lesions. A small, solid skin elevation refers to a papule, while an abnormal mass that varies in size, shape, and color could refer to a tumor or nodule. Lastly, a raised spot on the skin containing pus typically describes a pustule. Familiarity with these terms is vital for nail technicians and those in related fields to identify and address various skin issues effectively.