Black hair care products for relaxed hair. Hi Shekira, Give it two weeks at the most. 12.10.2018 Shagrel It changes families. Hi, How long should I wait to relax my hair after cholesterol hair treatment? Yes No. You can do both things before and after. If you zoom into the picture however you can see the numbers on the tape I used. When wet, kinky-textured hair tends to shrink because the coils come in close together. With a little tender loving care, plus the right products, your hair can be luscious, vibrant and more lively than ever. How long do I have to wait until I can put the relaxer in my hair? Wait at least three days. I think you should see a doctor Mia!