Can Hormones Change My Hair From Straight to Curly Hair? (2024)

byCleopatra Boudreau

As we get older, it’s normal to notice changes in our bodies. A wrinkle there, a freckle here. It’s all a part of the journey of becoming a wiser woman who knows what she wants from the world. When it comes to hair, many women start to notice that the texture goes from straight to curly hair. For some people the change is a surprising one, and though adding a little volume to previously pin-straight can be a fun boost, it may cause you to wonder why your hair has suddenly decided to take on a new shape.

Ah, hormones. Those funny chemicals that are introduced to us during puberty and haunt us from that point forward. For some girls, the change from straight to curly hair happens along with pimples and body changes. Though they may be more focused on whether or not their crush will ask them to slow dance with them at the winter formal, it can still be a bit of a shock to the system. Later in life, hormonal shifts continue to happen. Since hair changes often happen gradually, it’s possible you may wake up one morning and think - where did these sexy curls come from?

So to put it simply, the answer is - yes. Your newfound luscious curls are likely a result of hormonal changes, and they may be here to stay. We think that is a pretty exciting thing. If you hadn’t noticed, we're big fans of curly hair over here.

Can Hormones Change My Hair From Straight to Curly Hair? (1)

The Science Behind Texture Changes

Alright, I’m going to use some funky science words now, but I promise it’s interesting. The shape of your hair follicles is determined by genetics, and your physical makeup. Even though there are plenty of incredibly smart scientists that work to understand hair textures, there is no one conclusive answer as to why your hair may go from straight to curly. There are some very interesting theories though. Let me put my smart-girl glasses on and give you the basics.

Though you may first notice your hair follicles changing as you age, getting older isn't enough alone for hair to change from straight to curly. The main hormones that determine the nature of your hair follicles are Thyroxine, Triiodothyronine, androgens and insulin. A lack of Thyroxine and Triiodothyronine can make hair feel dry and brittle. Whereas an increase in androgens are more closely connected to affecting shape. A lack of insulin, on the other hand, is often connected to unwanted hair loss. All of these hormones are controlled by different regulators, and shifts in those levels cause changes throughout the body.

The genetic aspect of hair changes is fascinating. The gene that causes curly hair can actually be dormant until it’s activated (thanks Mom!). Remember those hormonal changes we talked about? Hair follicles in curly hair have a flatter shape, whereas straight hair follicles are round. When major hormonal changes happen, that previously sleeping gene is activated, which can cause your hair follicles to go from round to flat. Thus, a head full of waves or curls that you weren’t expecting.

Puberty, menopause and pregnancy all cause hormonal shifts that can make your tresses go from straight to curly hair. In fact, 40-50% of women experience major changes in their hair while pregnant or breastfeeding. In fact, one of those women was one of the founders of Royal Locks.

“Growing up I had medium thickness straight hair. Years later after having my first child and experiencing all the hormonal changes of motherhood, my hair became wavy! Although I loved my formally straight hair, I decided that this new wavy look seemed to express who I was: unique, approachable and fun. So, I decided to give it a chance.”

- Casey Simmons, Owner of Royal Locks

Certain medications and vitamins also have the ability to affect hair growth, along with getting a chemical perm that changes the bonds in the hair follicles. People who survive cancer and undergo chemotherapy may also find that their hair grows back with a different texture than before treatment.

The same way that the texture of the cluster of grey hairs on your head may be different than the rest of your gorgeous locks, curly hair that develops after changes in the body can grow in their own unique patterns. If you’re curious to learn more about how to take care of your greys, along with your new curls, you can learn more here.

My Hair Has Gone From Straight to Curly Hair - Now What?

With hair, there seems to be a grass is always greener mentality for many people. People often state that they would love to have hair that looks like someone else’s. We believe that you can embrace your hair no matter what the texture. So, here comes the fun part! Learning how to style your newly grown curly hair. There may be a tad of a trial and error period where you learn what your hair needs to be styled in a way that you love. It’s all a part of your beauty journey.

Investing in a hair care routine that is specifically designed to nurture your curls can make a huge difference in the way they make you feel like the stunning goddess that you are. By using a system that promotes healthy growth and hydrated hair strands, you can give your curls the chance to thrive. Some people may find that they need to use a new batch of hydrating or moisturizing products to prevent their curls from feeling dry. A little love can go a long way when it comes to wavy and curly hair.

Your Hair May Keep Changing

Can Hormones Change My Hair From Straight to Curly Hair? (2)

Life is unpredictable in general, and your hair is no different. Many women find that their hair changes texture and shape throughout the course of their life. As your hair regenerates, and grows, it may decide to dance on your head in different ways. There’s beauty in rediscovering your hair as you unearth who you are.

Maybe your new curls will inspire you to try a new haircut. Maybe they would look perfect with a new hat that you spotted window shopping a little while ago. And maybe, just maybe - and what I would hope for you - the new curls that bounce on your head can give you a new strut in your step.

Your hair is a part of you. Just like everyday you adapt, evolve and learn - so does your hair. No matter if your hair goes from straight to curly hair, and then curly to straight, then wavy to straight again, embracing it is the key to loving every part of you.

Don’t know where to start? We’ve got your back. Whether you have newfound new waves, curls or coils, the Royal Locks Curl Quiz can help you establish your curl pattern, and give you the best routine for your hair type.

Can Hormones Change My Hair From Straight to Curly Hair? (2024)

FAQs

Can Hormones Change My Hair From Straight to Curly Hair? ›

As we've briefly covered before, they most certainly do. Hormonal changes in the body can affect and change the shape and pattern of your hair follicle. Your hair follicle can cause curly hair when it has a slight curve and forms straighter hair when the tube or follicle is straight.

Can hormones make straight hair curly? ›

Drops in estrogen, like after childbirth or during perimenopause, can cause straight hair to wave or curl as the hair follicles produce a different shape.

Can your hair change from straight to curly? ›

Puberty, menopause and pregnancy all cause hormonal shifts that can make your tresses go from straight to curly hair. In fact, 40-50% of women experience major changes in their hair while pregnant or breastfeeding. In fact, one of those women was one of the founders of Royal Locks.

Can menopause change hair from straight to curly? ›

As you get more gray hair, you may find that your hair feels wirier or is suddenly curly in places. Hormones can affect the shape of some hair follicles, changing them from circle-shaped follicles that produce straight hair to oval-shaped follicles that produce curly hair.

Why is my hair getting curlier as I get older? ›

Ever wondered why your hair takes on new textures as you age? The answer lies within your hair follicles. As time goes on, follicles often shrink, affecting the thickness and structure of your hair shaft. This can enhance your curls or, on the flip side, make your once-curly hair lose some of its bounce.

Can straight hair turn curly permanently? ›

While permanently changing your hair's natural texture is impossible, it is good to know that you can enhance your curls using regular deep conditioning treatments. Also, you should always avoid heat styling and use curl-enhancing products to maintain a consistent curl pattern.

Can thyroid issues make your hair curly? ›

Another possible cause for curling of the hair is hypothyroidism. Hypothyroidism is a medical condition that can lead to dry, thinning and coarse hair due to a hormonal disbalance [11]. Hair follicles are direct targets of thyroid hormones.

What causes hair to curl naturally? ›

The exact shape of that bundle is determined by the hair follicle, which is a pore on the skin from where the hair grows. How the hair grows out of the follicle influences the distribution of its proteins. So a straight follicle produces straight hair and a curved follicle produces curly hair.

Does estrogen change hair texture? ›

During times of great hormonal shifts, like pregnancy and menopause, it's very common for changes in the texture of your hair. When estrogen levels rise during pregnancy, hair can become shinier, and more manageable. This occurs because the hair follicle gets slightly sturdier, and less prone to frizzing.

Why did my hair go from straight to frizzy? ›

It's a mixture of two things - humidity due to hot weather, and how hydrated your hair is to start with. The main cause of frizz is a lack of moisture in your hair. This causes your hair to seek out and absorb moisture from the air, causing frizz - which also explains why humidity can make frizz even worse.

How to know if estrogen is low? ›

Signs of low estrogen include:
  • Dry skin.
  • Tender breasts.
  • Weak or brittle bones.
  • Trouble concentrating.
  • Moodiness and irritability.
  • vagin*l dryness or atrophy.
  • Hot flashes and night sweats.
  • Irregular periods or no periods (amenorrhea).
Feb 8, 2022

How does perimenopause change your hair? ›

“As estrogen drops in perimenopause, a lot of women see their hair start to transform,” Sally says. “Maybe they notice it's thinning out, or it's drier than usual. I've had friends who have gone from straight hair to curly hair.” Hair loss and hair thinning are two of the most common changes.

What hormone makes hair curly? ›

One interesting aspect is the effect of changing hormones on hair texture. During puberty, the surge of oestrogen in pre-teen and teenage girls can physically change the shape of hair follicles. Straight hair can become curly (and curly hair can become straight), seemingly overnight.

Why did my hair get curly all of a sudden? ›

Hormones are a possible trigger for the curly hair gene. As well as affecting the quality of your hair, hormones can change your muscle tone too. This includes your scalp. The change of muscle tone could affect the shape of your hair follicles and their direction of growth.

Does curly hair make you look older or younger? ›

The wrong hair color can make you look washed out, and a bad haircut can make you look dated, even when paired with the most up-to-date makeup and fashion trends. As a curly girl, you already have a head start. Women with curly, textured hair tend to look younger than straight-haired counterparts as they age.

What causes curly and straight hair? ›

The exact shape of that bundle is determined by the hair follicle, which is a pore on the skin from where the hair grows. How the hair grows out of the follicle influences the distribution of its proteins. So a straight follicle produces straight hair and a curved follicle produces curly hair.

Why did my straight hair turn curly when I cut it? ›

Each time I have my hair cut for more than 5cm (2inches) it gets, not exactly curly, but curlier. That's because hair in fact has its own weight and even few centimeters can make a change and by that make the force that's weighing the hair down smaller. In some cases that's enough to make hair wavy.

Can stress make your hair go from curly to straight? ›

Can stress change your hair texture? Yes. There are several things that impact the quality and strength of your hair, and stress is one of them.

Why is my straight hair turning frizzy? ›

Excess Friction

It's common, natural, and unavoidable, but unfortunately, it lifts the hair cuticle and causes breakage, which leads to frizz. The most common causes of friction with hair include brushing or combing, flat-ironing, towel-drying, and tossing and turning while you sleep.

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