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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]
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Black-headed trogon Near Tulum, Mexico Conservation status Least Concern (IUCN 3.1) Scientific classification Domain: Eukaryota Kingdom: Animalia Phylum: Chordata Class: Aves Order: Trogoniformes Family: Trogonidae Genus: Trogon Species: T. melanocephalus Binomial name Trogon melanocephalus Gould, 1836 The black-headed trogon (Trogon melanocephalus) is a species of bird in the family ...
Amid mounting fears over the potentially deadly diseases the creatures can spread, one mother is raising concerns about a type of tick so small most people wouldn't be able to spot it on their own ...
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Rosacea. What it looks like: Rosacea causes redness and thick skin on the face, usually clustered in the center.Easy flushing, a stinging sensation, and small, pus-filled pimples are other common ...
Acne (/ˈækni/ listen ⓘ 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 .