Microneedling has come a long way over the past few years and can help skin via several methods. Firstly it releases cytokines and growth factors in the epidermis and dermis- the top and bottom layers of your skin. This in turn remodels scars and the dermal layer of the skin. Additionally needles can break up scars themselves. This leads to new collagen formation, and in practice can provide limited skin rejuvenation.