What term describes open lesions on the skin?

The term that describes open lesions on the skin is "ulcer." An ulcer is a sore that can occur on the skin or mucous membranes, and it is characterized by a loss of tissue, resulting in an exposed, open wound. These lesions can be the result of various conditions, including infections, pressure, or chronic inflammation.

Understanding ulcers is key in esthetic practices, as they require careful handling and specific treatment protocols to ensure proper healing and avoid further complications. In contrast, cysts are closed sacs that can often contain fluid or semi-solid material, but they do not represent an open lesion. Dermatitis refers to inflammation of the skin and is not specifically characterized by open lesions, while acne generally involves clogged pores and inflammation but does not denote the presence of an open sore in the same way that ulcers do.