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A comedo may be open to the air ("blackhead") or closed by skin ("whitehead"). [2] Being open to the air causes oxidation of the melanin pigment, which turns it black. [9] [2] Cutibacterium acnes is the suspected infectious agent in acne. [3] It can proliferate in sebum and cause inflamed pustules (pimples) characteristic of acne. [3]
Folliculitis keloidalis scarring on the nape of the neck is most common among males with curly hair. Oil folliculitis is inflammation of hair follicles due to exposure to various oils, and typically occurs on forearms or thighs. It is common in refinery workers, road workers, mechanics, and sheep shearers. Even makeup may cause it.
Acne (/ˈækni/ ACK-nee), also known as acne vulgaris, is a long-term skin condition that occurs when dead skin cells and oil from the skin clog hair follicles. [10] Typical features of the condition include blackheads or whiteheads, pimples, oily skin, and possible scarring.
Pustule: A pustule is a small elevation of the skin usually consisting of necrotic inflammatory cells. [30] Cyst: A cyst is an epithelial-lined cavity. [10] Wheal: A wheal is a rounded or flat-topped, pale red papule or plaque that is characteristically evanescent, disappearing within 24 to 48 hours.
Pseudofolliculitis nuchae, a related condition, occurs on the back of the neck, often along the posterior hairline, when curved hairs are cut short and allowed to grow back into the skin. Left untreated, this can develop into acne keloidalis nuchae, a condition in which hard, dark keloid-like bumps form on the neck. Both occur frequently in ...
The best way to combat blackheads and whiteheads is to know which one you're dealing with. Find out how to tell the difference between blackheads and whiteheads, plus how to treat both types of acne.
Sycosis vulgaris is a cutaneous condition characterized by a chronic infection of the chin or bearded region. [1]: 252 [2]The irritation is caused by a deep infection of hair follicles, often by species of Staphylococcus or Propionibacterium bacteria. [3]
AKN is characterized by firm pink, flesh-colored or hyperpigmented bumps in the skin, which are usually located on the back of the head or neck. This is mainly because men often cut their hair very low as opposed to women, allowing the hair to prick the occipital scalp thereby causing irritation.