Acne develops most often in teenagers. Usually it will wane over time and completely disappear after an individual reaches his early twenties. In extreme cases, it will last into the thirties and forties. The appearance of acne in adolescence can be especially stressful to the teenager, as this is a time when personal insecurities are rampant. Having a faceful of pimples only adds to this insecurity and can lead to severe depression. Therefore aggressive treatment is recommended.
The basic cause of acne is still unknown. It seems to be a multifactorial disease in which interaction of several factors play an important part in the pathogenesis. The primary event may be (a) obstruction of the sebaceous duct due to alteration in the pattern of keratinization within the follicle, (b) abnormal sebum production with excess quantities or altered composition or (c) increased bacterial colonization (proprionibacterium acnes and staphylococcus epidermi¬dis of pilosebaceous follicles which furnish the lipases responsible for hydrolysis of sebum triglycerides into free fatty acids. All three mechanisms may be involved. Obstruction of duct leads to forma¬tion of a comedone, the initial lesion of acne. A comedone can be located either in a closed follicle as a 'white head' consisting of lipid and keratin, or in an open follicle as 'black head' consisting of keratin and lipid with melanin deposition. The continual accumula¬tion of keratin and lipid may lead to rupture of the follicular wall and release of its contents into the surrounding dermis provoking an inflammatory tissue reaction.
Traditional saunas use heaters to warm the air and rocks in a room. When the rocks are placed over the heat source they reach extremely high temperatures. The stones help the room maintain the heat. The average temperature of traditional saunas run from 170 degrees to 190 degrees and sometimes the temperatures can reach above 200 degrees. When a person sits in these temperatures the body temperature increases also, causing the person to sweat. When people throw water onto the rocks in the traditional sauna, it is known as a steam shock.
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