Ｐａｇｅ 592 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 通常モードに戻る ┃ ＩＮＤＥＸ ┃ ≪前へ │ 次へ≫ ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ▼Causes of Acne Reeriahaw 11/12/18(日) 13:12 ─────────────────────────────────────── ■題名 ： Causes of Acne ■名前 ： Reeriahaw <dasdasdasd123@gmail.com> ■日付 ： 11/12/18(日) 13:12 -------------------------------------------------------------------------
| On the formation of acne affect sex hormones (androgens), bacteria, and genetic predisposition. This is accompanied by: 1) Increased production of sebum. Male sex hormones (androgens) stimulate the production of sebum in bodies of boys and girls. During adolescence androgen levels usually are within normal limits. Increased formation of sebum in acne is usually caused not by elevated levels of androgens, but increased sensitivity of receptors to androgens. The degree of sensitivity is determined by genetic and hereditary factors. Adult acne can be associated with increased levels of androgens. 2) Obstruction of the excretory ducts of the sebaceous glands and the hair follicle is caused by increased formation of new cells inside the ducts of the sebaceous glands and hair follicles. These processes are influenced by male hormones (androgens) with the participation of genetic factors (genetic predisposition). The obstruction of ducts and hair follicles leads to the accumulation of sebum and increases the size of the follicle. 3) Increased number of bacteria in the hair follicle is associated with the stagnation of sebum in the hair follicle. Metabolic products of bacteria cause inflammation of the hair follicle. 4) Sometimes (but not always) inflammation results in a rupture of stretched wall of the follicle. The contents of the follicle (sebum, bacteria and their products) penetrate in the surrounding tissue and cause inflammation not only in the follicle but in larger areas of skin. What factors worsen acne? 1) Fluid retention in the body. Aggravation of acne during premenstrual period is caused by swelling of the sebaceous glands due to fluid retention. The same process is responsible for the worsening of the disease during active sweating. 2) Skin contamination with mineral oils (lubricating oils, petroleum products). Some cosmetic products may contain oils that worsen acne. Therefore patients with acne should be cautious in using cosmetics or stop using it. 3) Certain medications (including birth control pills) may aggravate acne. 4) Mechanical irritation (scratching, squeezing the skin), as well as popping pimples worsen the state of skin. What factors facilitate acne or have no effect on its course? 1) Formerly it was thought that high-fat and sweet food aggravate acne. Now it is proved that any food doesn稚 affect the course of acne. 2) Solar radiation facilitates the cure of acne. Therefore in the spring and summer the disease is usually milder than in autumn and winter. It痴 important not to overdo. Excessive sun exposure dries the skin, which can worsen acne. Effectiveness of artificial UV radiation (for example a solarium) is not proved. Copyright: Causes of Acne <Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0; Avant Browser [avantbrowser...＠SOL-FTTB.127.105.163.188.sovam.net.ua> |