Wavy hairstyles are all the rage, even among people with straight hair. But using a curling iron is fiddly and time-consuming and you also risk singeing your hair. So if you want to keep your curls ...

I’ve wanted a perm for years now, but with the amount of damage my hair went through with multiple bleaching sessions (I had a pastel pink phase), I had to wait until I had a full head of virgin hair.

Editor’s note: German inventor Karl Nessler patented the first permanent wave machine, which used borax solutions and electric heated rollers to curl the hair, in 1909. About a decade later, this ...