Hair grows from the root. You can get a relaxer that will permanently straighten the hair but the roots will grow in curly. It’s pretty hard on your hair though, and generally speaking you still have to blow dry it straight to get it smooth.
(If you are talking about your own hair - learning to take care of it can make curly hair an absolute joy to have, and you can still get it blown straight on occasion. I find that the best approach.)
Hair grows from the root. You can get a relaxer that will permanently straighten the hair but the roots will grow in curly. It’s pretty hard on your hair though, and generally speaking you still have to blow dry it straight to get it smooth.
(If you are talking about your own hair - learning to take care of it can make curly hair an absolute joy to have, and you can still get it blown straight on occasion. I find that the best approach.)