When it comes to hair textures best suited for the treatment, anyone with fine ends can get volume and body from a perm; people with medium or thick hair can get texture and shape.

Tatiana Dudley, Moroccanoil hair stylist ambassador, says that the modern-day perm, which still relies on chemicals to alter the texture and shape, is milder, less damaging, and comes with less ...

We consulted pros to explain the various types of perms, the step-by-step process, and the best way to maintain your curls. Mint Images/Getty Images The world of perms is undeniably complex. Not only ...