Acne
Acne vulgaris (normally named acne) is a familiar skin condition, caused by changes in pilosebaceous units, skin structures consisting of a hair follicle and its related sebaceous gland, via androgen stimulation. It is characterized by noninflammatory follicular papules or comedones and by inflammatory papules, pustules, and nodules in its more severe forms. Acne vulgaris affects the areas of skin with the densest population of sebaceous follicles; these areas involve the face, the upper part of the chest, and the back. Severe acne is inflammatory, but acne can also show in noninflammatory forms.Acne lesions are commonly referred to as pimples, blemishes, spots, zits, or simply acne.
Acne happens most normally throughout adolescence, affecting more than 89% of teenagers, and regularly continues into adulthood. In teenage years, acne is typically caused by an escalation in male sex hormones, which people of both genders accrue for the period of puberty. For most individuals, acne diminishes over time and tends to disappear-or at the very least decrease-after one reaches one's early twenties. There is, nevertheless, no way to predict how long it will take to disappear entirely, and some people will carry this condition well into their thirties, forties and beyond.
The face and upper neck are the most usuallyaffected, but the chest, back and shoulders may have acne as well. The upper arms can also have acne, but lesions found there are frequently keratosis pilaris, not acne. Conventional acne lesions are comedones, inflammatory papules, pustules and nodules. Some of the large nodules were previously named "cysts" and the term nodulocystic has been used to explain harsh cases of inflammatory acne.
Aside from scarring, its main symptoms are psychological, such as reduced self-esteem and, according to at least one study, depression or suicide.Acne normally appears during adolescence, when people already tend to be most socially insecure. Early and aggressive rehab is therefore advocated by some to lessen the overall impact to persons
For reasons no one entirely understands, follicles, frequently called pores, occasionally get blocked. Sebum (oil) which normally drains to the surface gets blocked and bacteria starts to grow up. Both whiteheads and blackheads start out as a microcomedone.
Two types of acne
Non-inflammatory acne
Whitehead
Microcomedones turn out to be non-inflamed skin blemishes named comedones--either a whitehead or a blackhead:When the trapped sebum and bacteria stay below the skin surface, a whitehead is formed. Whiteheads may occur up as tiny white spots, or they may be so small that they are invisible to the naked eye.
Blackhead
A blackhead occurs when the pore opens to the surface, and the sebum, which contains the skin pigment melanin, oxidizes and turns a brown/black color. It's not dirt and can not be washed away. Blackheads can remain for a long time because the contents very slowly drain to the surface.
Inflammatory acne
An inflamed lesion can every now and then fully collapse or explode, brutally inflaming the all-around skin, and occasionally engulfing neighboring follicles. These lesions are named nodules or cysts:
papule
A papule happens when there is a break in the follicular wall. White blood cells rush in and the pore becomes inflamed.
pustule
A pustule forms various days later when white blood cells make their method} to the surface of the skin. This is what persons usually refer to as a "zit" or a "pimple".
nodule
When a follicle breaks along the bottom, total collapse can show, causing a large, inflamed bump that can be sore to the touch.
cyst. From time to time a serious inflammatory reaction can result in very large pus filled lesions.
milia
Milia are tiny white bumps that occur when usually sloughed skin cells get trapped in small pockets on the surface of the skin. They are common in newborns across the nose and upper cheeks and can also be seen on adult skin. The bumps vanish as the surface is worn away and the dead skin is sloughed. In newborns, the bumps normally go within the first few weeks of way of life. However, for adults milia may maintain for an indefinite period.
Recovery is typically not indicated in children. Adults can have them removed by a physician for cosmetic improvement.
References:
http://www.acne.org/whatisacne.html
http://en.wikipedia.org/wiki/Acne_vulgaris
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Acne
