A dermaroller is a skin care device that may help rejuvenate the skin, treat acne scarring, and reduce signs of aging. To use a dermaroller, a person simply needs to roll the device on their skin.Dermarolling or microneedling is a process that was originally carried out by a dermatologist. Nowadays, it is also commonly done at home with little training. It has gained popularity in recent years as an accessible, effective, and relatively non-invasive skin treatment.