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Male pattern baldness

Alopecia in men; Baldness - male; Hair loss in men; Androgenetic alopecia

Male pattern baldness is the most common type of hair loss in men.

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Male pattern baldness
Hair follicle

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Causes

Male pattern baldness is related to your genes and male sex hormones. It usually follows a pattern of receding hairline and hair thinning on the crown.

Each strand of hair sits in a tiny hole (cavity) in the skin called a follicle. Generally, baldness occurs when the hair follicle shrinks over time, resulting in shorter and finer hair. Eventually, the follicle does not grow new hair. The follicles remain alive, which suggests that it is still possible to grow new hair.

Symptoms

The typical pattern of male baldness begins at the hairline. The hairline gradually moves backward (recedes) and forms an "M" shape. A circular area on the back of the head (vertex) often thins and expands in size over time. Eventually the hair becomes finer, shorter, and thinner, and creates a U-shaped (or horseshoe) pattern of hair around the sides of the head and a bald area on the back of the head.

Exams and Tests

Classic male pattern baldness is usually diagnosed based on the appearance and pattern of the hair loss.

Hair loss may be due to other conditions. This may be true if hair loss occurs in patches, you shed a lot of hair, your hair breaks, or you have hair loss along with redness, scaling, pus, or pain.

A skin biopsy, blood tests, or other procedures may be needed to diagnose other disorders that cause hair loss.

Hair analysis is not accurate for diagnosing hair loss due to nutritional or similar disorders. But it may reveal substances such as arsenic or lead.

Treatment

Treatment is not necessary if you are comfortable with your appearance. Hair weaving, hairpieces, or change of hairstyle may disguise the hair loss. This is usually the least expensive and safest approach for male baldness.

Medicines that treat male pattern baldness include:

Other treatments that are being investigated include:

Suturing hair pieces to the scalp is not recommended. It can result in scars, infections, and abscess of the scalp. The use of hair implants made of artificial fibers was banned by the FDA because of the high rate of infection.

Outlook (Prognosis)

Male pattern baldness does not indicate a medical disorder, but it may affect self-esteem or cause anxiety. The hair loss is usually permanent.

When to Contact a Medical Professional

Call your health care provider if:

References

Dinulos JGH. Hair diseases. In: Dinulos JGH, ed. Habif's Clinical Dermatology. 7th ed. Philadelphia, PA: Elsevier; 2021:chap 24.

Fisher J. Hair restoration. In: Rubin JP, Neligan PC, eds. Plastic Surgery, Volume 2: Aesthetic Surgery. 4th ed. Philadelphia, PA: Elsevier; 2018:chap 21.

Hesseler MJ, Shyam N. Platelet-rich plasma and its utilities in alopecia: a systematic review. Dermatol Surg. 2020;46(1):93-102. PMID: 31211715 pubmed.ncbi.nlm.nih.gov/31211715/.

Sperling LC, Sinclair RD, El Shabrawi-Caelen L. Alopecias. In: Bolognia JL, Schaffer JV, Cerroni L, eds. Dermatology. 4th ed. Philadelphia, PA: Elsevier; 2018:chap 69.

Torres AE, Lim HW. Photobiomodulation for the management of hair loss. Photodermatol Photoimmunol Photomed. 2021;37(2):91-98. PMID: 33377535 pubmed.ncbi.nlm.nih.gov/33377535/.

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Review Date: 4/14/2021  

Reviewed By: Elika Hoss, MD, Senior Associate Consultant, Mayo Clinic, Scottsdale, AZ. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.

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