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The final structure of the abscess is an abscess wall, or capsule, that is formed by the adjacent healthy cells in an attempt to keep the pus from infecting neighboring structures. However, such encapsulation tends to prevent immune cells from attacking bacteria in the pus, or from reaching the causative organism or foreign object.
The dermis is the layer of skin between the epidermis and subcutaneous tissue, and comprises two sections, the papillary dermis and the reticular dermis. [24] The superficial papillary dermis interdigitates with the overlying rete ridges of the epidermis, between which the two layers interact through the basement membrane zone. [ 24 ]
The chronic inflammatory condition that usually includes comedones, inflamed papules, and pustules is called acne. [3] [4] Infection causes inflammation and the development of pus. [2] Whether a skin condition classifies as acne depends on the number of comedones and infection. [4] Comedones should not be confused with sebaceous filaments.
Pus is an exudate, typically white-yellow, yellow, or yellow-brown, formed at the site of inflammation during infections, regardless of cause. [1] [2] An accumulation of pus in an enclosed tissue space is known as an abscess, whereas a visible collection of pus within or beneath the epidermis is known as a pustule, pimple or spot.
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.
Severe acne usually indicates the necessity of prescription medication to treat the pimples. Prescription medications used to treat acne and pimples include isotretinoin , which is a retinoid , anti-seborrheic medications, anti-androgen medications, hormonal treatments, alpha hydroxy acid , azelaic acid , and keratolytic soaps.
[18] [19] Acne vulgaris is the disease most commonly associated with C. acnes infection. [ citation needed ] Cutibacterium acnes is one of the most common and universal skin diseases, affecting more than 45 million individuals in the United States. 20% of all dermatologist visits are related to treating acne-related issues.
Acne aestivalis (Mallorca acne) [nb 1] [nb 2] [nb 3] Acne conglobata; Acne cosmetica (cosmetic acne) Acne fulminans (acute febrile ulcerative acne) Acne keloidalis nuchae (acne keloidalis, dermatitis papillaris capillitii, folliculitis keloidalis, folliculitis keloidis nuchae, nuchal keloid acne) Acne mechanica; Acne medicamentosa