Can microneedling for hair loss cause permanent damage if its left on the skin in one place too long?

Great question, thank you!  Microneedling is overall a very safe and effective procedure to help brighten and tighten your skin.  The amount of redness after the procedure is often a result of how deep the treatment was.  Also, depending on how easy someone bruises, this too can affect the hyperpigmentation after the treatment.  All typically resolve within a few days.  Thanks again for your question.  Best wishes, Dr. Lindsay J. Sturm

You should not be afraid of microneedling.  It is a very safe procedure.  Some areas require the provider to penetrate deeper which can make the skin look darker.  Perhaps there is a bruise under the skin also contributing to the darker color.  Either way, your skin should recover just fine.