What Are the Exact Causes of Acne?

Author: Karan Naidoobr
Source: ezinearticles.combr
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People do not always regard acne as a major problem. However, having acne may lead to mental and psychological stress, resulting in a loss of self esteem. What exactly causes acne? In theory, acne is brought about by an imbalance of hormones. Hormonal imbalance causes skin glands to secrete too much oil, [...]