Dermatologists agree that micro-needling is incredibly effective. For the uninitiated, micro-needling treatments involve using tiny needles to superficially puncture the skin and create “micro-injuries,” which trigger the natural wound-healing response and dramatically boost collagen and elastin production. Translation? It can give you smoother, plumper, and more youthful-looking skin. It can even drastically minimize the appearance of acne scars.

Here’s the thing, though. Not all microneedling treatments are the same. Dermatologists back professional microneedling treatments, undergone in an office setting under the guidance of an expert. They often caution against at-home microneedling treatments, AKA derma-rollers, because they can do more harm than good (more on that in a minute).