What term describes an open lesion that is accompanied by pus?

The term that describes an open lesion accompanied by pus is a pustule. A pustule is a small, raised bump on the skin that is filled with pus, which is a thick fluid that typically contains dead white blood cells, bacteria, and tissue debris. This type of lesion is often associated with inflammatory skin conditions such as acne and folliculitis.

Understanding pustules is important for estheticians as they may encounter clients dealing with various skin issues, including those generated by acne or infections. Recognizing the characteristics of a pustule can help in providing effective treatments and educating clients about proper skincare practices.