Background of the Study
Acne is a very common skin disease. It is also very common to teenagers. Acne is not a serious health risk, though severe acne can cause permanent scars. Acne can also damage self-esteem. Almost 8 out of 10 teenagers have acne. Acne vulgaris (simply known as acne) is a common human skin disease, characterized by areas of skin with scaly red skin (seborrhoea), blackheads and whiteheads (comedones), pinheads (papules), pimples (pustules), large papules (nodules) and possibly scarring. Acne affects mostly skin with the densest population of sebaceous follicles; these areas include the face, the upper part of the chest, and the back.
Acne occurs most commonly during adolescence, and often continues into adulthood. In adolescence, acne is usually caused by an increase in testosterone, which accrues during puberty, regardless of sex. For most people, acne diminishes over time and tends to disappear — or at the very least decreases — by age 25. There is, however, no way to predict how long it will take to disappear entirely, and some individuals will carry this condition well into their thirties, forties, and beyond. Acne is so common with teenagers that it is considered as part of puberty. Hormones released at the onset of puberty are responsible for the appearance of acne during the teen years. These hormones stimulate the skin's oil glands (sebaceous), creating an oily skin that is more prone to pore blockages and breakouts. Teenagers who are very upset about the state of their skin may also use topical medications to excess, in an attempt to speed clearing. It's important for teens to understand that all acne medications, including over-the-counter remedies, must be used as directed. Applying too often or in too great of concentration can easily cause excessive dryness, peeling, redness, irritation, and can actually increase healing time.
Guavas are plants in the Myrtle family (Myrtaceae) genus Psidium, which contains about 100...
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