They differ from epidermal inclusion cysts only in size. They frequently occur around the eyes and are distinguished from closed comedones by the absence of a visible follicular ostium.
Treatment consists of opening the cysts and expressing the contents.
This eruption, which usually occurs on the trunk, appears as inflammatory papules but is not unequivocally associated with hair follicles. Some areas of vague erythema may be marked by regularly spaced, clearly follicular papules. When pus is expressed from a suppurating lesion, Gram's stain reveals the characteristic gram-positive budding yeast. Treatment consists of shampooing with topical selenium sulfide, applying topical imidazole antifungal drugs, or taking oral ketoconazole. It is often associated with the use of fluorinated topical steroids on that part of the body.