What are very large vesicles commonly referred to as?

Very large vesicles are commonly referred to as bullae. Bullae are fluid-filled blisters that can vary in size but are typically larger than 0.5 centimeters in diameter. They form when the layers of the skin separate and fill with fluid, often due to friction, burns, or other skin irritations. Bullae can be found in various skin conditions, such as dermatitis or infections.

In contrast, papules are small, raised bumps on the skin, scale refers to dry, flaky skin, and patches are flat areas of skin that differ in color or texture from the surrounding skin. These terms describe different characteristics and types of skin lesions, further underscoring why bullae is the correct choice for the definition of very large vesicles.