Rejuvapen causes the skin to produce collagen and elastin, which in turn minimizes fine lines and wrinkles while giving the skin an overall more youthful and rejuvenated appearance. Other uses for this treatment include firming and the reduction of acne scars, stretch mark’s and c-section scars as well as hair regrowth when combining it with PRP. It’s actually a very versatile product. To many people, the most appealing thing about the product is the fact that the Rejuvapen procedure can be performed with very little pain and discomfort and low down time.