a black-tipped plug clogging a pore of the skin
a clogged hair follicle, the small shaft where hair grows
an enlarged hair follicle
a plug of keratin and sebum in a dilated pilosebaceous orifice/pore
a sebaceous follicle clogged by sebum, dead cells from inside the sebaceous follicle, tiny hairs, and even bacteria
a sebaceous follicle plugged with sebum, dead cells from inside the sebaceous follicle, tiny hairs, and sometimes bacteria
Blackhead. A plug of keratin and sebum within a dilated hair follicle. Often contains bacteria.
A plug of keratin and sebum within an expanded sebaceous follicle, frequently containing P. acnes
where lactiferous ducts fill with cells that resemble sebaceous secretions and can be expressed by squeezing
(KOM eh doh) singular; plural, comedones (KOM eh dohns): Non-inflammatory acne lesion. There are three types of comedones. The microcomedo is a clinically invisible accumulation of corneocytes in the follicular canal. The microcomedo is the original acne lesion. The closed comedo (whitehead) evolves from the microcomedo and appears as a white dot that may be difficult to see unless the skin is stretched. The open comedo (blackhead) appears as a dark-topped dot.