Itching scar 18 days after microneedling. Hi everyone, hope you can help me. I am using a microneedle device to improve a trauma scar i have on my face. After 18 days of treatment my scar (1 year and 3 months old) itches from time to time. Is this a good sign?. Or just something normal that happens to every scar. I would like to know if this might be improving it, or it is just a coincidence.