Mastering Techniques for Unique Curl Patterns, Follicle Shapes, and Healing Tendencies

A universal solution is an oxymoron in hair care. One tool, technique, or product to fit all hair types is an elusive fantasy supported by the misleading idea that people of different ethnicities, skin tones, and ages have similar hair types and, by extension, hair care requirements. In reality, all hair is different, as individual as the person wearing it. Variations in curl pattern, porosity, hair shape, and healing process are based on your biology—your genetics and physical and chemical environment. The highly trained technician, trichologist, stylist, colorist, or barber will understand the science behind hair diversity and not only recognize that all hair is different but will embrace the fact and take pride in tailoring your technique to fit your hair.

Hair’s physical properties and traits are essential to mastering advanced styling. Curl pattern is often the first characteristic considered, including Type 1, 2, 3, and 4. However, these “types” are not interchangeable. They have a unique geometry that informs their styling needs. At the microscopic level, straight hair has a perfectly round cross-section, allowing the sebum on your scalp to easily travel down the hair shaft. It is often the hair type most prone to oily roots. For this reason, most techniques must center around volumizing and adding body to the hair without weighing it down. Lightweight hydrating products and texturizing techniques, such as a precision cut, will give straight hair movement and lift.

Wavy hair has an elongated follicle that produces the flattened shaft, causing its characteristic “S” shape. It is also more porous than straight hair, which makes it more prone to frizz. When humidity gets through the cuticle layer, it swells the hair shaft, which causes it to lose definition. So, most styling techniques and products will focus on adding definition without making it feel or look heavy. Often these styling techniques are referred to as “squish to condish.” Waves are the most common hair type, and popular mousses and gels are perfect for adding lightweight, flexible hold.

Curly and coily hair’s follicles are the most elliptical (or in the case of coily hair, nearly flat). As a result, their shape causes the hair to form spirals, zig-zags, or tight coils. Curly and coily hair has many styling challenges. First, because the follicle is not round, it cannot easily transport scalp sebum down the hair shaft. Hair tends to be dryer and more brittle as a result. Second, all of the bends in curly and coily hair act as points of weakness, making it more prone to breakage. Because of this, styling is extremely important. Curly hair needs hydration, moisture, and slip. Products such as deep conditioners, the Loc (Liquid, Oil, Cream) method, or glycerin-based products that attract moisture to the hair strand are key. Manipulation must be done with care to minimize stress on the hair. Detangling must be done with a generous amount of slip-producing conditioner and a wide-tooth comb or with your fingers, starting from the ends and working your way up. Cutting curly and coily hair requires an experienced hand. It is often cut on dry hair to see the curl’s natural fall and shape. Cutting curly and coily hair incorrectly can easily disrupt the curl pattern, so experience and knowledge are key. Techniques such as “dusting” (trimming only a small amount of length to get rid of split ends) and protective styling (braids, twists, buns, etc.) are important and must be tailored for maximum benefit for curly and coily hair.

Hair diversity begins in the follicle. It is this shape that determines your curl pattern and the bulk of the characteristics that result. The perfectly round follicle will produce straight hair, while the oval and increasingly flatter follicle will produce waves, curls, and coils. The follicle shape also impacts hair density and porosity. The more follicles one has, the thicker their hair will be and the more weight it will have. Density will determine which styling techniques can be used to manage the hair and ensure that product reaches the scalp. For those with low-density hair, techniques will be chosen that add fullness and the illusion of density, including layering and root-lifting products.

Hair porosity is your hair’s ability to absorb and retain moisture, determined by the cuticle, the outermost layer of the hair shaft, which is, in turn, formed by the shape of the follicle. High porosity hair has raised, gapped cuticles, meaning moisture can enter the hair shaft, but it can also escape, leaving it often dry and frizzy. Techniques to manage high porosity hair include using heavier creams and butters to “moisture seal” the shaft. Low porosity hair, more common in certain Type 3 and 4 hair patterns, but found across all types, has tightly bound cuticle layers that do not allow moisture to enter. Techniques to manage low porosity hair include using heat (steamers and thermal caps during conditioning) to gently open the cuticle and letting it cool to close and lock in moisture. Products for this hair type must be lightweight, liquid-based to penetrate the hair shaft, and should include humectants to help draw in moisture from the environment. Products with a heavy butter and oil content will sit on the hair and cause buildup.

Hair healing tendencies are where hair becomes an art form. Hair is not an inert fiber but a record of what has been done to it in the past. Each permed or highlighted section, each day in the sun, and every pass with a straightening iron leaves a degree of trauma on the hair. Tailored techniques recognize these damages and understand the individual hair’s ability to “heal.” It is important to note that, as hair grows out of the follicle, it is dead tissue. It cannot repair itself. However, tailored “healing” techniques can slow the progression of damage and nurture the follicle to encourage healthy, new hair growth.

If hair has been chemically processed—bleached, colored, relaxed, or permed—the cuticle is usually damaged, and the porosity is likely high. Tailored techniques will help rehabilitate the hair and include a strict regimen of protein treatments. Protein (hydrolyzed keratin or wheat protein) acts as a temporary bandage for the gaps in the damaged hair shaft and restores strength and elasticity. Balance is key; protein overload will leave hair feeling and looking brittle, so it is critical that protein treatments are followed by intense moisture and done in the correct sequence and frequency. Heat-damaged hair has a similar story. These hair types will require the same protein regimen and strict avoidance of all heat styling. Mandatory use of heat protectants to form a barrier over the hair will prevent further damage.

For hair that has been cut and colored or heat-styled, damage is in the past. Healing and prevention of future damage focus on scalp health and supporting the follicle in producing healthy new hair. The scalp is often the gateway to damaged hair, and determining whether it is oily, congested, dry, or flaky is key to deciding which techniques work best. Oily, congested scalps need clarifying shampoos and physical exfoliation to open up clogged follicles, while dry, flaky scalps will benefit from soothing, moisturizing ingredients such as aloe vera or tea tree oil. Scalp massages are also not just for fun; they are a therapeutic tool to increase blood flow to the follicles and provide oxygen and nutrients essential to the production of healthy hair. Special considerations for conditions such as alopecia or trichotillomania often require a more specialized, even medical, approach and may involve collaboration with dermatologists and natural, noninvasive techniques.

Tailoring hair care is a critical shift from overgeneralized types. The advanced stylist or trichologist will be the artist and the scientist. It will take their unique blend of observational skills and technical knowledge to read the story of your curl pattern, determine your follicle’s shape from the hair’s behavior, and determine its past trauma or damage and future potential. They will understand that one technique can bring life to fine, straight hair and destroy thick, coily hair and that one product will moisturize high-porosity curls while coating and dulling low-porosity waves. It is a must for any client or consumer who takes their hair care seriously. It is the final recognition that our hair is a reflection of our unique biology. It is a complex, responsive system that requires a unique, tailored approach to care. By understanding the complex interplay of curl pattern, follicle shape, and damage and healing tendencies, we can move hair care from an all-out war on our natural texture to a celebration of its unique properties.