After you shave (legs) your hair grows back to its original length. How does it know it's been cut and how long to grow back? - Quora
Hair Growth - Learn The Science That Determines How Fast Your Hair Grows — HairKnowHow.Com Professional Hair Testing Services - Hair Clinics, Trichologists & Private Clients
![BBC Two - Trust Me, I'm a Doctor, Series 2, Episode 2 - Is it true that shaving causes hair to grow back faster and thicker than it was before? And is BBC Two - Trust Me, I'm a Doctor, Series 2, Episode 2 - Is it true that shaving causes hair to grow back faster and thicker than it was before? And is](https://ichef.bbci.co.uk/images/ic/1040x1040/p0287fk6.jpg)