why is my hair curly underneath but straight on top

why is my hair curly underneath but straight on top

Curly hair can be a unique and beautiful trait, but it can also come with its fair share of challenges. One common phenomenon that many people experience is having curly hair underneath while the top layers remain straight.

This can be puzzling and frustrating, especially when it comes to styling and managing your hair. But fear not, there are scientific explanations behind this curly-under-straight-on-top phenomenon.

Hair texture and its variations

Hair texture and its variations is essential in comprehending why some individuals have curly hair underneath while their top layers remain straight. Hair is primarily made up of a protein called keratin, which is produced in the hair follicles located in the scalp. The shape of the hair follicle determines the texture of the hair.

People with round hair follicles tend to have straight hair, while those with oval or irregularly-shaped follicles have curly or wavy hair.

The reason why the underneath hair is curly while the top layers are straight can be attributed to the growth patterns of hair follicles. Hair follicles on the scalp are not uniform and can have variations in shape and structure. Hence, it is not uncommon for people to have different textures in different sections of their hair.

The Science behind curly and straight hair

The science behind curly and straight hair is an intriguing subject that can shed light on why one’s hair may have different textures underneath and on top. The shape of the hair follicle is a significant determining factor in hair texture. As mentioned before, people with round hair follicles tend to have straight hair, while those with oval or irregularly-shaped follicles have curly or wavy hair.

The direction of the hair growth also plays a role. The angle at which hair grows out of the follicle can influence the curl pattern. If the hair follicle is slanted, the hair will grow out of the scalp at an angle, causing it to be curly or wavy. On the other hand, if the hair follicle grows straight out of the scalp, the hair will be straight.


There are several factors that can contribute to the differences in hair texture between the top and the underneath of your hair. One of the main reasons is genetics. Your hair texture is determined by your DNA, and it is not uncommon for individuals to have different hair types on different parts of their head.

Another factor that can play a role is the way you style your hair. If you frequently use heat styling tools or chemical treatments, it can lead to damage and alter the texture of your hair.

Moreover, environmental conditions and exposure to sunlight can also impact the texture of your hair. UV rays from the sun can weaken the hair and make it more prone to damage, resulting in varying textures.

Proper hair care for mixed texture hair

Proper hair care is essential for managing mixed texture hair. Here are some tips to help you maintain and style your different hair textures:

1. Moisturize:

Curly hair tends to be drier, so it’s important to keep it hydrated. Use a moisturizing shampoo and conditioner specifically formulated for curly hair. Apply a leave-in conditioner or a hair oil to lock in moisture and prevent frizz.

2. Detangle gently:

Use a wide-toothed comb or your fingers to detangle your curly hair. Start from the ends and work your way up to minimize breakage. Avoid brushing curly hair while it’s dry as it can cause frizz.

3. Style with care:

Use products specifically designed for your hair type. For the straight hair on top, use a lightweight styling product to add volume and control. When styling curly hair underneath, opt for curl enhancing products to define and enhance your curls.

4. Protect from heat:

Limit your use of heat styling tools as they can cause damage. If you must use them, apply a heat protectant spray before styling. Use lower heat settings and avoid overexposing your hair to heat.

5. Regular trims:

Get regular trims to remove split ends and maintain the health of your hair. This will prevent further damage and promote healthier hair growth.

Taking care of mixed texture hair requires attention and a tailored approach. Experiment with different products and techniques to find what works best for your unique hair. With a little patience and care, you can embrace and enhance the beauty of your diverse hair textures!

Tips for managing curly Hair

When it comes to styling your mixed texture hair, there are a few techniques you can try to create a harmonious look.

Create volume on top:

Since your hair is straight on top, you can add volume and texture by using a volumizing mousse or dry shampoo at the roots. Gently tease the hair at the crown for added height. This will create a nice balance between your curly underneath and straight on top sections.

Define your curls:

To enhance your curly hair underneath, try using a curl-defining cream or mousse. Apply the product to damp hair and scrunch it with your hands to encourage natural curl formation. You can also use a diffuser attachment while blow-drying to minimize frizz and enhance the curls.

Blend the textures:

To seamlessly blend your curly and straight hair, consider incorporating braids or twists. These styles can help to visually merge the two textures and create a cohesive look.

Experiment with accessories:

Adding headbands, scarves, or clips can also help to tie your mixed texture hair together. Opt for accessories that complement both your curly and straight sections, and experiment with different styles to find what suits you best.

Remember, managing mixed texture hair requires patience and experimentation. Embrace your unique hair and have fun trying out different styles and techniques to showcase the beauty of your natural textures.

Embracing and celebrating 

Your hair texture is a beautiful combination of curly and straight, and it’s important to embrace and celebrate this uniqueness. Instead of trying to make your hair conform to one texture, why not embrace the diversity and create stunning styles that showcase both your curly and straight sections?

One way to do this is by playing with different partings. Experiment with both a middle part and a side part to see which one complements your hair texture combination better. This simple change can instantly refresh your look and highlight the contrast between your curly and straight sections.

Another option is to incorporate different styling techniques that enhance each texture. For example, you can create soft waves on top using a curling iron or straighten your underneath curls for a sleek and polished look.

Lastly, remember to take care of your hair by using products specifically designed for mixed texture hair. Look for hydrating conditioners and leave-in treatments that cater to both curly and straight hair.


Your hair is a beautiful reflection of the diversity and uniqueness that makes you who you are. Embracing your hair’s varying textures is an opportunity to celebrate and love yourself just as you are.

Remember, there is no one-size-fits-all when it comes to hair. Each individual’s hair is different, and that is what makes it special. So instead of trying to make your hair conform to societal norms or trends, embrace your natural beauty and treasure the stunning combination of curly and straight sections.

As you navigate your hair care routine, continue to experiment with different styles, partings, and techniques that enhance each texture. Don’t be afraid to play around and have fun with your hair, as it is a canvas for self-expression.