Thinning at the crown: what it means for men

Many men only find out their crown is thinning when they see a photo taken from above, or when a barber mentions it. Thinning at the crown, also called the vertex, is one of the two main ways male pattern hair loss develops. The other is a receding hairline. Here is what you should know.

Why the crown thins

Male pattern hair loss, or androgenetic alopecia, is caused by a combination of male hormones (androgens) and an inherited sensitivity in certain areas of the scalp ¹. It typically affects the front and top of the head, including the crown.

The key hormone is dihydrotestosterone (DHT), made from testosterone by an enzyme called 5-alpha reductase. In genetically sensitive follicles, DHT is believed to shorten the growth phase of the hair from the usual three to six years to just weeks or months. The follicles also shrink, producing finer and fewer hairs over time ¹. A review in the journal Endocrine described this as progressive follicle miniaturisation in androgen-dependent areas, and noted that many genes are involved ².

The hair at the back and sides of the head is usually much less sensitive to DHT. This is why even men with advanced crown loss often keep a horseshoe of hair around the sides, and why that area is used as the donor area in hair transplants.

Signs your crown is thinning

• More scalp shows at the crown in photos, or under bright overhead lights
• The hair at the crown swirl looks less dense or wider than before
• Hair at the crown feels finer and does not grow as long
• Your barber or partner comments on it

A normal crown swirl can look sparse, especially when hair is wet or short. Compare photos taken in the same light over several months to see whether it is actually changing.

How it is classified

Doctors often use the Norwood scale to describe male pattern hair loss. Some stages include a type where thinning starts at the crown and others where it starts at the front, and in advanced stages the two areas merge ³. See the Norwood scale explained.

Treatment options

There is no cure for male pattern hair loss, but treatments can slow it and help some men keep or thicken their hair. All of them need patience and continued use.

Minoxidil

Topical minoxidil is applied to the scalp, usually twice a day. MedlinePlus notes it works best in men under 40 whose hair loss is recent, that it does not work on receding hairlines, and that it takes at least four months, possibly up to a year, to see an effect. Most new hair is lost within a few months of stopping ⁴. Because it does not help a receding hairline, the crown is where it is most useful. See our minoxidil guide.

Finasteride

Finasteride is a prescription tablet that blocks the production of the hormone in the scalp that drives male pattern hair loss. It can take at least three months to see any improvement, and benefits are expected during the first 12 months. If you stop, any hair gained is likely to be lost within a year ⁵. Possible side effects include reduced sex drive and erection or ejaculation problems ⁵. A review of 15 trials found a modestly increased risk of sexual side effects with these medicines ⁶. Women who are or could become pregnant should not handle broken tablets ⁵. See our finasteride guide.

How do they compare?

A 2022 network meta-analysis of 23 studies compared different doses of minoxidil, finasteride and dutasteride in men. Results varied with the dose and the time point, and the authors called for more head-to-head trials ⁷. In practice, doctors often discuss using more than one treatment together.

Other options

• Hair transplant: moves follicles from the back of the head to the thinning area. It needs enough donor hair and usually ongoing medical treatment to protect the remaining hair. See FUE vs FUT
• Scalp micropigmentation: a cosmetic tattoo that gives the look of a short shaved haircut or denser crown. See SMP
• Other treatments: DermNet notes low-level laser therapy is of unproven benefit, and platelet-rich plasma is still being studied ¹

What does not help

• Products that promise quick or dramatic results without evidence
• Frequent washing or not washing: neither causes or prevents pattern hair loss
• Hats and helmets: these do not cause crown loss, unless they are very tight and rub constantly

When to see a doctor

See a doctor if:

• The thinning is fast, or you are under 25
• There are bald patches, redness, scaling or itching on the scalp
• You are also losing hair from other areas of your body
• You would like to start finasteride or discuss other options

The bottom line

Crown thinning is a common pattern of male hair loss caused by genes and DHT. Starting treatment early gives the best chance of keeping your hair, and minoxidil and finasteride are the medicines with the strongest evidence. Results take months, and treatment needs to continue to maintain them. Transplants and micropigmentation are options if medicines are not enough.

Frequently asked questions

Why is my crown thinning?

Usually male pattern hair loss, caused by inherited sensitivity to the hormone DHT in certain areas of the scalp ^{1 2}.

Does minoxidil work on the crown?

Yes, the crown is where it is most useful. It does not work on receding hairlines, and takes at least four months to show an effect ⁴.

Will crown hair loss stop on its own?

Male pattern hair loss tends to progress over time. Treatment can slow it ^{1 5}.

Is finasteride safe?

Most men take it without problems, but sexual side effects can occur. Discuss the risks with your doctor ^{5 6}.

Educational content. Not medical advice.