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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.
The pH of the skin is between 4.5 and 6.2, [21] an acidity that helps to neutralize the alkaline nature of contaminants. [22] Sebaceous lipids help maintain the integrity of the skin barrier [10] [23] [24] and supply vitamin E to the skin. [25]
These units are mostly on the face, neck, upper chest, shoulders, and back. [3] Excess keratin combined with sebum can plug the opening of the follicle. [3] [8] This small plug is called a microcomedo. [8] Androgens increase sebum (oil) production. [3] If sebum continues to build up behind the plug, it can enlarge and form a visible comedo. [8]
Nasal sebum. Nasal sebum, also known as nose grease/oil, is grease removed from the surface of the human nose.The pores of the lateral creases (where the nose joins the face) of the exterior of the nose create and store more oil and grease than pores elsewhere on the human body, forming a readily available source of small quantities of grease or oil.
Dandruff is a skin condition of the scalp. [1] Symptoms include flaking and sometimes mild itchiness. [1] [2] It can result in social or self-esteem problems. [4]A more severe form of the condition, which includes inflammation of the skin, is known as seborrhoeic dermatitis.
When excess tears are produced, the liquid drains through the inner corner of the eyelids, through the nasolacrimal duct, and into the nasal cavities. As more tears are shed, more liquid flows into the nasal cavities, both stimulating mucus production and hydrating any dry mucus already present in the nasal cavity.
Cushing's syndrome is a collection of signs and symptoms due to prolonged exposure to glucocorticoids such as cortisol. [4] [9] [10] Signs and symptoms may include high blood pressure, abdominal obesity but with thin arms and legs, reddish stretch marks, a round red face due to facial plethora, [11] a fat lump between the shoulders, weak muscles, weak bones, acne, and fragile skin that heals ...
Cleansing is a standard step in skin care routines. Skin cleansing includes some or all of these steps or cosmetics: Cleansers or foaming washes are used to remove excess dirt, oil, and makeup left on the skin. [24] Different cleansing products are aimed at various types of skin, such as sulfate-free cleansers and spin brushes. [24]