collagen induction therapy. microneedling the skin

acne after age aging anatomy beautiful beauty before bleeds body break care cell collagen cosmetic damage dermal dermatology dermis device diagram disease elastic elastin epidermal epidermis fiber health healthy human illustration induction layer layers marks medical medicine micro needle needling old older pigmentation problem production puncturing removing repeatedly scars science section skin skincare slightly smoother sterile stimulate strands stretch structure surface surgical therapy thicker tighter tissue treatment vector woman wrinkle wrinkles young younger