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If you think your hair is changing texture, going from straight to curly, and it's freaking you out a little, don't worry. You're not alone. And there's a perfectly logical explanation, too. You can't prevent it, but the good news is that you can make the most of it.
The reason why hair is curly or straight in the first place has to do with the shape of your hair follicle. The follicle is the tube-like structure inside your head from which hair grows. If your follicles are flat, your hair will be straight. If your follicles are round, your hair will be curly. A lot of women with a mixture of straight, curly and wavy know that you can have different shaped follicles throughout your dome. Scientists don't know the exact mechanics behind follicles changing, but they do know what life changes precede hair texture turnaround.
Hormonal changes are the key cause of hair going from straight to curly or visa versa. How do you know if you've had a hormonal change? Well, turns out there are some pretty important times in your life when hormones go in and out of whack: puberty, pregnancy and menopause. As certain hormone levels change in your body, the shape of your hair follicles changes right along with them. There is one other hormonal change that could occur in your life, causing a hair type switcheroo. The big C, cancer, followed by chemotherapy can produce hair texture changes.
Christo, of the Christo Fifth Avenue Salon in New York City, says that hair changes every five to seven years. So even without hormonal changes it's possible for the texture of your hair to change. Not only that, but the thickness of your hair changes as well. Babies are born with each strand of hair being very thin, or fine. Strands thicken and become more coarse with age. Then in those golden years, hair thins out again.
So, changes in your hair could be due to hormones or just the normal course of your life. Either way, it's impossible to predict. Some pregnant women see no changes in hair texture at all; the same goes for pubescent teens and menopausal ladies. The best thing you can do for yourself is not be in denial of your hair changes. You'll have your best hair days using shampoos, conditioners and other hair products that are made for whatever type of hair you're currently rocking. If your hair change is hormonal, chances are it'll go back to what you're used to over time. So work with what you've got and wait it out.