However, no-lye relaxers often dry out the hair. For this reason, those who don’t have sensitive scalps should consider using a lye relaxer. [1] X Research source

Get a relaxer with mild strength if your hair is fine, color-treated, or damaged. If you have thick, coarse hair, you can try a “super” strength relaxer. Make sure to apply it as directed in the instructions, as improperly used relaxers can cause breakage. [2] X Research source

If you do accidentally scratch your scalp, the relaxer will likely make your head tingle.

Petroleum jelly is also a sufficient protective base option.

If you’ve never applied relaxer before, you’ll be coating all of your hair. If you have, then you should only be applying it to your roots. Avoid getting the relaxer on your scalp. Don’t apply the relaxer to the parts of your hair that aren’t new growth. You’ll over-process the hair and may cause damage.

Do not comb the hair. [11] X Research source

Some people leave the relaxer on longer to achieve “bone straight” hair, but it’s typically more attractive to take the product off when you’re supposed to because then your hair will have some body. Also, leaving it on too long can damage your hair.

Deep condition your hair weekly with a protein treatment or moisturizing mask. [18] X Research source