Hair Whorl: What It Is and What Research Shows

A hair whorl is the spiral where hair radiates from a point on the scalp. It affects how hair lies and parts, but we found no evidence that it affects how fast or how thick your hair grows.

Here's what research says about normal whorl patterns, whether whorls are genetic, and when a whorl is worth mentioning to a doctor.

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Key Takeaways

• Single and double parietal (crown) whorls are normal scalp patterns.
• Hair whorl direction appears genetically influenced in twin data, but studies in different populations disagree.
• Frontal whorl patterns vary, and a whorl with a cowlick can sit anywhere along the front hairline.
• We found no study showing that a whorl affects hair growth speed, thickness or loss.

What Is A Hair Whorl?

A hair whorl (or crown) is the point where hairs spiral outward in a clockwise or counterclockwise direction. A cowlick is a whorl located along the front hairline.

Does Your Whorl Affect Hair Growth?

Not as far as the research shows. A whorl is about the direction hair lies, not how fast it grows. If you want to know whether hair is growing normally, track length and density over time, not whorl position.

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Styling With A Whorl

• Work with the direction. Hair tends to follow the whorl, so cut and part with it in mind.
• Ask your stylist to look at your crown before choosing a cut.
• Don't confuse a whorl with thinning. A swirl of hair at the crown that shows scalp may be your whorl, but check with a dermatologist if the area is widening.

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What The Research Shows

Normal Patterns

A review of scalp whorls reports that single and double parietal whorls are examples of normal scalp patterns. Frontal patterns are variable, and a whorl with a cowlick can be seen at any location along the frontal hairline. The review also noted that abnormally placed or absent scalp whorls have been associated with abnormal brain development, while describing cases of unusual whorls in people with normal development (Samlaska et al., 1989).

Are Whorls Genetic?

In a study of 37 pairs of twins and children from the Northern and Southern hemispheres, twins' whorls rotated preferentially in the same direction, which the authors took as evidence that whorl formation is a genetically determined developmental process. Counterclockwise whorls were more frequent in the Southern hemisphere sample (Willems et al., 2024).

Differences Between Populations

A study of Japanese individuals found whorl orientation to be random, leading the author to conclude it isn't genetically determined in that population, and that genetic variation for the trait exists between regions (Klar, 2009).

See also: Micro Bangs: What to Know Before You Cut · Normal Hair Part vs Thinning: How to Tell the Difference

Frequently Asked Questions

Does a hair whorl affect hair growth?

We found no study showing that it does. A whorl affects the direction hair lies.

Is a hair whorl genetic?

Twin data suggest genetic influence, but a study of Japanese individuals found random orientation, so the picture isn't settled.

Is a double whorl normal?

Yes. Single and double parietal whorls are normal scalp patterns. If you have a concern about an unusual whorl, ask your doctor.

References

1. Samlaska CP, James WD, Sperling LC. Scalp whorls. J Am Acad Dermatol. 1989. PubMed
2. Willems M, Hennocq Q, de Lara ST, et al. Genetic determinism and hemispheric influence in hair whorl formation. J Stomatol Oral Maxillofac Surg. 2024. PubMed
3. Klar AJ. Scalp hair-whorl orientation of Japanese individuals is random; hence, the trait's distribution is not genetically determined. Semin Cell Dev Biol. 2009. PubMed