Hair loss
Hair loss is a common condition with multiple causes and treatments.
SMPWIKI101 · CC BY-SA 4.0
Hair loss, also known as alopecia or baldness, refers to a loss of hair from part of the head or body. Typically at least the head is involved. The severity of hair loss can vary from a small area to the entire body. Inflammation or scarring is not usually present. Hair loss in some people causes psychological distress. Common types include male- or female-pattern hair loss, alopecia areata, and a thinning of hair known as telogen effluvium.
- field
- Dermatology and trichology
- known_for
- Common types include male- or female-pattern hair loss, alopecia areata, and telogen effluvium
- prevalence_men_by_age_50
- about half
- prevalence_women_by_age_50
- a quarter
- alopecia_areata_lifetime_prevalence
- about 2%
Lore & Background
The cause of male-pattern hair loss is a combination of genetics and male hormones; the cause of female pattern hair loss is unclear; the cause of alopecia areata is autoimmune; and the cause of telogen effluvium is typically a physically or psychologically stressful event. Telogen effluvium is very common following pregnancy. Less common causes of hair loss without inflammation or scarring include the pulling out of hair, certain medications including chemotherapy, HIV/AIDS, hypothyroidism, and malnutrition including vitamin B12 and iron deficiencies. Causes of hair loss that occurs with scarring or inflammation include fungal infection, lupus erythematosus, radiation therapy, and sarcoidosis.
Reader's Guide
Hair loss is a widespread experience, with pattern hair loss by age 50 affecting about half of men and a quarter of women, and about 2% of people developing alopecia areata at some point. Treatment of pattern hair loss may simply involve accepting the condition, which can also include shaving one's head. Interventions that can be tried include the medication minoxidil (or finasteride) and hair transplant surgery. Alopecia areata may be treated by steroid injections in the affected area, but these need to be frequently repeated to be effective. Hair loss can cause psychological distress, with two meta analyses on androgenetic alopecia revealing psychosocial distress levels to be moderate, on average, rather than severe, and that balding men were no more likely to have depression or self esteem issues compared to non-balding men. Hair loss induced by cancer chemotherapy has been reported to cause changes in self-concept and body image, with body image not returning to the previous state after regrowth of hair for a majority of patients.
Did You Know?
- Telogen effluvium is very common following pregnancy, with hair loss often occurring approximately three months after giving birth.
- Male pattern hair loss is believed to be due to a combination of genetics and the male hormone dihydrotestosterone.
- Alopecia areata may be treated by steroid injections in the affected area, but these need to be frequently repeated to be effective.
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Frequently Asked Questions
Who is Hair loss?
Hair loss, also called alopecia or baldness, is a condition in which a person sheds hair from the scalp or other body areas, ranging from a small patch to the entire head. It generally does not come with inflammation or scarring, and it can affect anyone regardless of sex.
What are Hair loss's main 'subclasses' or forms?
The three most commonly discussed types are male- and female-pattern baldness, alopecia areata (a patchy, autoimmune-driven form), and telogen effluvium, a diffuse thinning often triggered by stress or illness. Fans of the topic usually sort discussions around these three categories.
How widespread is Hair loss in the 'universe'?
By the time they reach 50, roughly half of men and about a quarter of women will experience noticeable thinning. Alopecia areata specifically has a lifetime prevalence of around 2 percent of the population.
Why is Hair loss important to the fan community?
It sits at the intersection of dermatology and trichology, making it one of the most searched personal-care topics. Beyond the medical side, many people report that the condition causes real psychological distress, which keeps it a central and emotionally resonant subject.
How does Hair loss's story typically end?
Outcomes depend heavily on the subtype: some cases of telogen effluvium reverse on their own once the trigger is removed, while pattern baldness is usually managed with topical or oral medications and, in select cases, transplant surgery. A full cure is not guaranteed for every form, so long-term management is often the realistic endpoint.
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