There was a case where someone did dermaplaning at home without proper knowledge. They used a dull blade. Instead of getting a smooth result, they ended up with a patchy and uneven skin texture. Some areas had been over - dermaplaned while others were left untouched. It looked really bad and took a long time to even out the skin again. This shows that dermaplaning should be done carefully and preferably by a professional.
Once, a friend had a dermaplaning session. The esthetician pushed too hard during the process. As a result, her skin was not only red and irritated immediately after, but in the following days, it started to peel in an abnormal way. It was so bad that she had to stay at home for a few days until the skin started to heal. The whole experience was really a horror story for her as she expected a smooth and glowing skin instead of this mess.