Does Wearing a Hat Cause Hair Loss? What the Research Says
Wearing a hat won't make you go bald, but a very tight hat worn every day can stress hair follicles. Here's what dermatologists say and how to wear hats safely.
Key takeaways
- Wearing a hat does not cause male or female pattern baldness, which is mainly hereditary.
- A very tight hat worn often could cause traction alopecia, hair loss from repeated pulling on the roots.
- A twin study found hat-wearing men actually had less hair loss at the temples than their twins who didn't wear hats.
- Dirty hats can irritate the scalp, so wash or rotate them regularly.
- Choose a hat that fits comfortably, and don't wear it over tight hairstyles or wet hair.
In this article
It's one of the most common hair myths: wear a baseball cap every day and you'll go bald. Plenty of men who are starting to lose their hair worry that their favorite cap is to blame, and some stop wearing hats altogether. So, does wearing a hat really cause hair loss?
The short answer: no, a normal hat won't make you bald. The most common type of hair loss is hereditary, and hats don't cause it. There is one exception worth knowing about, though: hats that are too tight.
Where the myth comes from
The idea usually comes from two assumptions: that hats "suffocate" the scalp by cutting off oxygen, and that friction from a cap rubs hair out. Neither holds up. Hair follicles get oxygen and nutrients from the blood supply under the skin, not from the air around your head.
The more likely explanation is correlation. Many men who notice thinning start wearing hats to cover it, so hats and hair loss end up appearing together, even though one didn't cause the other.
Does wearing a hat cause hair loss? What the research says
There isn't much research on hats specifically, but what exists is reassuring. Cleveland Clinic points to a study of 92 pairs of male identical twins: the twins who wore hats every day actually had less hair loss at the temples than their brothers who didn't. One possible explanation is that hats protect the scalp from sun damage.
Researchers don't consider that proof that hats prevent hair loss. But it does suggest everyday hat-wearing isn't the cause.
The real risk: hats that are too tight
Hair loss caused by constant pulling on the roots is called traction alopecia. It's most often linked to tight hairstyles, such as ponytails, braids, extensions and weaves, but dermatologists note that a very tight hat worn day after day could create the same kind of tension.
Early signs of traction alopecia can include:
- Thinning or a receding line where the hat band sits, often at the temples or the back of the head
- Small bumps, redness or soreness along the hairline
- A tight or tender feeling after taking the hat off
The important part: caught early, traction alopecia is often reversible once the source of tension is removed. If it continues for a long time, though, it can permanently damage the follicles. So if your hat leaves a deep red mark or feels tight, it's worth fixing.
Can dirty hats cause hair problems?
A hat that's rarely washed collects sweat, oil and bacteria. That won't cause pattern baldness, but it can irritate the scalp and contribute to issues such as dandruff, itching or inflamed hair follicles (folliculitis). If those flare up and go untreated, they can make the scalp less healthy overall. Washing your hats regularly is an easy fix.
What actually causes most hair loss
The most common cause of hair loss in both men and women is hereditary hair loss (androgenetic alopecia), also called male or female pattern hair loss. It's driven mainly by genetics and hormones. Other common causes include:
- Excessive shedding after stress, illness or giving birth
- Tight hairstyles (traction alopecia)
- Some medications and medical conditions
- Alopecia areata, which causes patchy hair loss
Not sure whether what you're seeing is normal? Read how much hair loss is normal for the signs that mean it's worth seeing a dermatologist.
How to wear hats without hurting your hair
- Check the fit. You should be able to slide a finger comfortably under the band. If it leaves a deep red line, size up or loosen the strap.
- Rotate your hats so the band doesn't press on exactly the same spot every day.
- Wash them regularly, especially caps you wear for sport or in hot weather.
- Choose breathable materials such as cotton or mesh-back caps.
- Don't put a hat on wet hair. Wet hair is more fragile and trapped moisture can irritate the scalp.
- Skip tight hairstyles under hats. A tight bun or ponytail plus a tight hat doubles the pulling.
- Give your scalp a break for part of the day, especially if you wear a hat for work.
Hats as a styling tool
If you're self-conscious about thinning, there's nothing wrong with wearing a hat you love. Just make sure it fits well. If it's the back of your head that worries you, here's how to hide a bald spot on the crown without a hat. For days without a hat, a short textured haircut and a little hair fiber can give you confidence too. See our guide to haircuts for a receding hairline for ideas.
Frequently asked questions
Does wearing a hat every day cause baldness?
No. Wearing a hat does not cause male or female pattern baldness, which is mainly hereditary. Only a very tight hat worn often may cause hair loss, through a condition called traction alopecia.
Can a tight hat cause hair loss?
It can. A hat that is too tight puts constant tension on the hair roots, which can lead to traction alopecia over time. Caught early, the hair often grows back once the tension stops.
Do hats stop your scalp from breathing?
No. Hair follicles get oxygen from the blood supply under the skin, not from the air, so a hat cannot starve your hair of oxygen.
Is it bad to wear a hat with wet hair?
It is best to avoid it. Wet hair is more fragile, and trapped moisture and sweat can irritate the scalp. Let your hair dry first.
How often should I wash my hats?
Wash caps you wear often every week or two, and more often if you wear them for sport or sweat a lot. Clean hats help keep your scalp free of irritation.
Sources
Health information in this article is based on the cited dermatology sources and is not a substitute for advice from a doctor. How we research.
Written by Shadush Sachiska
Shadush Sachiska is the founder and editor of 360 Hair Loss. Shadush researches every guide from dermatology sources and real-world styling advice to help readers with thinning hair look and feel their best. Shadush is not a doctor; health topics are written to help you have a better conversation with one.
