hard plug composed of sebum and dead skin cells. The mildest type of acne.
When the sebum plug of a comedo is exposed to air, it oxidizes and becomes a blackhead.
According to the NIH, it is called a comedo.
comedo
Comedones
A blackhead, or open comedo is a wide opening on the skin with a blackened mass of skin debris covering the opening. Despite their name, some blackheads can be yellowish in color. A comedo is a widened hair follicle which is filled with skin debris (keratin squamae), bacteria and oil (sebum). A closed comedo is a whitehead, while an open comedo is a blackhead. the plural of "comedo" is comedomes".
the plural word is comedones
Comedo
When sebum hardens and the sebaceous duct becomes clogged, the pore impaction that forms is known as a comedo. This can be either an open comedo, or blackhead, where the surface remains open, or a closed comedo, or whitehead, where the follicle is completely blocked. These impactions can lead to acne if bacteria proliferate in the clogged pore. Proper skincare can help prevent and manage these conditions.
Depends on the lesion. Could be comedonal, papular, pustular or nodular.
When the sebum plug of a comedo is exposed to air, it oxidizes and becomes a blackhead.
Stagnant and dried-out sebum is often referred to as "keratin plugs" or "comedo." These can manifest as blackheads or whiteheads on the skin, where the sebum mixes with dead skin cells and becomes trapped in hair follicles. When exposed to air, the oxidized sebum darkens, resulting in blackheads, while a closed comedo appears as a whitehead. Proper exfoliation and skincare can help prevent their formation.
To safely manually extract comedones, first cleanse the skin thoroughly and apply a warm compress to soften the pores. Use a sterilized extraction tool, applying gentle pressure around the comedo to avoid damaging the skin. If the comedo does not easily release, do not force it, as this can lead to irritation or infection. After extraction, apply an antiseptic or soothing product to the area to promote healing.