What is the common term for a type of skin lesion that contains pus?

A skin lesion that contains pus is commonly referred to as a pustule. Pustules are small, raised areas on the skin that are filled with a yellowish fluid, which is typically composed of white blood cells, dead skin cells, and bacteria. This type of lesion is often associated with inflammatory conditions, infections, or skin disorders like acne.

Vesicles refer to small, fluid-filled blisters that do not contain pus but rather clear fluid. Macules are flat, distinct, discolored areas of skin that do not involve any fluid, while wheals are raised, itchy areas of skin often caused by allergic reactions, typically not containing pus either. Therefore, pustules are uniquely identified by their pus content, making them the correct answer in this context.