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Collagen injection: Collagen, a normal substance of the body, is injected under the skin to “stretch” and “fill out” certain types of superficial and deep soft scars. Collagen treatment usually does not work as well for ice-pick scars and keloids. Collagen derived from cows or other non-human sources cannot be used in people with autoimmune diseases. Human collagen or fascia is helpful for those allergic to cow-derived collagen. Cosmetic benefit from collagen injection usually lasts 3 to 6 months. Additional collagen injections to maintain the cosmetic benefit are done at additional cost.

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10 Simple Ways on How to Cure Back Acne
There are so many ways on how to cure back acne. Back acne is like the ordinary forms of acne – nothing special. It does appear as pustules, pimples, blackheads or in the worst case like an acne cyst. This is common during puberty when the sebaceous gland is starting to function aggressively. Back acne is no respecter of age, sex, race or whatever.
Source: ezinearticles.com