Hair types - the complete guide to understanding your hair

Knowing your hair type is essential to being able to care for your hair correctly. Many experience problems such as dry hair, greasy scalp, lack of shine or frizz, without knowing that the cause is often incorrect care in relation to the hair's structure and needs. Hair types vary greatly from person to person, as does the need for shampoo, care and styling.

In this guide, you will get a thorough review of the most common hair types, how to identify your own, and how to choose the right products for your particular hair.

What is meant by hair types?

When you talk about hair types, you typically refer to the hair's natural structure and shape. It can be straight, wavy, curly or very curly hair. In addition, factors such as hair thickness, porosity and the condition of the scalp also play a large role.

Your hair type is largely genetically determined, but is also influenced by:

• Styling habits

• Heat treatment

• Chemical treatments

• Climate and environment

• Products you use

Therefore, the hair's needs can change over time.

The four main hair types

Hair is often divided into four main categories. Each category can again be divided into subgroups, but this division gives a good overview.

Type 1 – Straight hair

Straight hair has no natural waves or curls. It often has a glossy surface because the hair's cuticle layer is dense.

Characteristics:

• Reflects light well

• Gets greasy quickly

• Often lacks volume

Type 2 – Wavy hair

Wavy hair lies between straight and curly hair and has a slight S-shape.

Characteristics:

• Natural movement

• Can be frizzy

• Requires balance between moisture and lightness

Type 3 – Curly hair

Curly hair forms distinct spirals and often needs extra moisture.

Characteristics:

• Dries out easier

• Has a lot of structure

• Requires caring products

Type 4 – Very curly / coily hair

This hair type has dense, small curls or zigzag structure.

Characteristics:

• Very dry

• Fragile hair

• Has great need for moisture and protection

How to find your hair type

To identify your hair type, it is important to see the hair as it is completely natural. Start by washing your hair thoroughly and then let it air dry completely without the use of styling products, blow dryers or heat. In this way, you get the most accurate picture of the hair's natural structure, movement and fall. Many people are surprised to find that the hair is actually more wavy or curly than they thought when it is not styled.

When the hair is dry, you can start to observe it and ask yourself some simple questions:

• Does the hair fall straight down, or does it form natural waves or curls?

• Does your hair quickly lose moisture and feel dry in the lengths?

• Does the scalp get greasy quickly, even shortly after washing?

• Is the hair fine, medium thick or thick when you feel it?

It can also be a good idea to look at how the hair reacts during the day. Does it frizz easily? Does it lack volume? Or does it get heavy quickly? Together, the answers provide a clear picture of your hair type, the hair's structure and its specific needs, so that you can more easily choose the right products and the right care routine.

Hair types and hair thickness

In addition to texture, hair thickness plays an important role. Hair can be:

• Fine

• Medium thickness

• Powerful

Fine hair often needs light products, while thick hair typically requires more moisture and nourishment.

Hair types and scalp

The condition of the scalp is as important as the hair itself.

Common scalp types

• Dry scalp

• Oily scalp

• Sensitive scalp

• Combined scalp

It is important to choose shampoo based on the scalp – and care products based on the length of the hair.

Choice of shampoo according to hair type

Shampoo should always be adapted to your hair type and scalp. Wrong shampoo can create imbalance.

At HairSouk you will find a wide selection of shampoos suitable for different hair types:
https://hairsouk.dk/collections/shampoo

General recommendations:

• Smooth and greasy hair → light, cleansing shampoo

• Wavy hair → moisturizing but not heavy

• Curly hair → sulfate-free and caring

• Dry scalp → soothing shampoo

Styling and finishing for different hair types

Styling products should support the hair's structure – not work against it.

Which styling goes with what?

You can find styling and finishing products targeted at different hair types here:
https://hairsouk.dk/collections/styling-finishing

Care and hair masks for different hair types

Regardless of hair type, hair needs deep care. The difference lies in how often and how heavy the care should be.

When do you need a hair mask?

• If the hair feels dry or rough

• If the hair is chemically treated

• If curls lack definition

• If the hair breaks easily

At HairSouk you will find deeply nourishing masks for all hair types:
https://hairsouk.dk/collections/deep-treatment-maske

Hair types and porosity

Porosity describes how well the hair absorbs and retains moisture.

• Low porosity → difficulty absorbing moisture

• Medium porosity → balanced

• High porosity → loses moisture quickly

Curly and chemically treated hair often has high porosity and requires extra care.

Common mistakes in the care of hair types

Many people experience problems with their hair because the care is not adapted to the specific hair type or scalp. This can result in dry, lifeless, greasy or frizzy hair – even if you use good products. Often it's not about using wrong products, but about using the right products in the wrong way or in the wrong amount.

Typical mistakes

• Too heavy products in fine hair, which can weigh the hair down and make it look flat and greasy

• Too little moisture for curly hair, which can lead to dryness, frizz and a lack of definition

• Wrong shampoo for the scalp, which either dries out or overstimulates fat production

• Too frequent heat treatment, which can damage the hair structure and make it more porous

In addition, many people wash their hair too often or use too much product, which can create build-up and imbalance. Small adjustments such as choosing a lighter or more moisturizing formula, reducing heat use or adapting the washing routine can make a significant difference to the health, appearance and manageability of the hair over time.

Hair types change over time

Your hair type is not static. It may change due to:

• Age

• Hormones

• Pregnancy

• Stress

• Seasons

Therefore, it is important to continuously assess the hair's needs.

Overview: hair types and care

Hair care starts with the right products

Understanding hair types is the first step towards healthy and well-groomed hair. When you choose products that match both hair and scalp, hair becomes easier to style, feels healthier and looks shinier.

You can find everything from shampoo and styling to deep care in one place at HairSouk:
https://hairsouk.dk/

Healthy hair begins with knowledge

Hair types are not "good" or "bad" - they are just different and each has their own unique needs. When you get to know your hair and understand its structure, thickness and need for moisture or lightness, it becomes much easier to give it the right care. Instead of fighting against your hair's natural properties, you can start working with them and bring out the best in your hair, whether it's straight, wavy or curly.

The right knowledge makes it possible to make more conscious choices, both when it comes to washing, styling and choosing products. When this knowledge is combined with products adapted to your hair type and scalp, you can achieve hair that feels healthier, stronger and more manageable in everyday life. The result is not only better-looking hair, but also a simpler and more effective hair care routine that supports the hair's natural balance - every single day.