Does Hair Grow Back Thicker When You Cut It?

No.

A few quick facts about hair

  • Hair grows at a rate of about 1.25cm per month.
  • Hair follicles grow hairs in cycles.
  • Example 1: Eyelash hairs have a short cycle. They grow for about 8 weeks and then fall out.
  • Example 2: Hair on your head has a much longer cycle. A single hair can grow for months (or even years) before it falls out
  • At the begginning of the growth cycle the hair is very fine and may be slightly white.
  • The hair becomes thicker as it grows.
  • Men and woman have about 100,000 hairs on their body

If you cut a hair in the middle of it’s growth cycle at skin level, within a few days it would have grown enough to be clearly visible again.

Because it is in the middle of it’s growth cycle, it is at it’s thickest, so it appears that it has grown back thicker.

Not so.

The hair is not aware that it has been cut. It is inert. It has not “grown back” it has merely continued its growth cycle unaware that it has been cut.

I’m glad I could clear that up for you. Now, go, get on with your life.