Assertion: acne's comedo | /r/HasProperty | open
Facets:
Source sentences:
text: Comedones may be open, their upper or visible portion being darkened by oxidative changes, or they may be closed (i.e., not reaching the surface to be extruded), in which case, they may be starting points for pustules and deep inflammatory lesions.
text: A comedo can be open (blackhead) or closed by skin (whitehead) and occur with or without acne.
text: The lesions in the skin formed by acne include comedones, which can be open or closed plugs that form at the base of hairs.
text: Clogged pores are also known as comedones, which can be open (blackheads) or closed (whiteheads), and might lead to more inflamed and larger blemishes that we all commonly associate with acne.
text: Non-inflammatory acne is characterized by comedones, which can be open or closed.