Microneedling is safe, with minimal side effects or risks associated. The skin will be red in appearance for a couple of hours following microneedling treatment, much like moderate sunburn, with some minor bleeding and bruising possible. The area will feel warm, dry or tight for a short while. Other side effects typically include minor flaking or dryness of the skin, with scab formation in rare cases. If you have a history of cold sores, this could possibly flare up after treatment.