Hair Loss in Women — Causes, Treatments, and When to Seek Help

Last updated: 5 March 2026

Medically reviewed by Dr. Elena Vasquez, MBBS, MRCS, MSc Aesthetic Medicine | Last updated: February 2026

Hair loss in women is far more common than many people realise, affecting approximately 40% of women by age 50. Yet it remains under-discussed, often causing significant emotional distress and loss of confidence. Unlike male pattern baldness — which follows a predictable pattern — female hair loss presents in diverse ways with multiple potential causes, making accurate diagnosis essential for effective treatment. In this guide, we explore the causes, evidence-based treatments, and practical guidance for women experiencing hair thinning or loss.

Understanding Female Hair Loss: The Scale of the Problem

According to the British Association of Dermatologists, approximately 8 million women in the UK experience some form of hair loss. Despite this prevalence, research and awareness have historically focused on male hair loss, leaving many women feeling isolated and without adequate support (Messenger et al., 2022).

Hair growth follows a cycle of three phases: anagen (active growth, 2-7 years), catagen (transition, 2-3 weeks), and telogen (resting/shedding, 2-4 months). At any given time, approximately 85-90% of scalp hairs are in the anagen phase. Disruptions to this cycle — whether hormonal, nutritional, or inflammatory — can shift the balance toward shedding and thinning.

Common Causes of Hair Loss in Women

Female Pattern Hair Loss (Androgenetic Alopecia)

The most common type, affecting up to 50% of women over their lifetime. Unlike men who experience receding hairlines and crown balding, women typically notice diffuse thinning across the top of the scalp while maintaining their frontal hairline. It is caused by a combination of genetic susceptibility and androgen sensitivity, and worsens progressively without treatment.

Telogen Effluvium

A temporary but often alarming condition where a large number of hairs simultaneously shift from growth phase to shedding phase, typically 2-4 months after a triggering event. Common triggers include:

• Childbirth (postpartum hair loss)
• Significant weight loss or crash dieting
• Major surgery or illness
• Severe emotional stress
• Medication changes (including starting or stopping contraceptives)
• Iron deficiency or thyroid disorders

The good news is that telogen effluvium is usually self-resolving once the trigger is addressed, though recovery can take 6-12 months.

Alopecia Areata

An autoimmune condition causing patchy hair loss in well-defined circular areas. It can occur at any age and affects approximately 2% of the population. While many cases resolve spontaneously, some progress to alopecia totalis (complete scalp loss) or alopecia universalis (complete body hair loss). Recent breakthroughs in JAK inhibitor therapy have transformed treatment options (Marks et al., 2023).

Traction Alopecia

Caused by prolonged tension on hair follicles from tight hairstyles — braids, ponytails, weaves, extensions, or turbans. It typically affects the hairline and temples. Early intervention is crucial, as prolonged traction can cause permanent follicular damage.

Hormonal Causes

Hormonal fluctuations significantly impact hair growth in women:

• Polycystic ovary syndrome (PCOS) — Elevated androgens cause thinning on the scalp while increasing facial and body hair
• Menopause — Declining oestrogen levels reduce the hair’s growth phase duration
• Thyroid disorders — Both hypothyroidism and hyperthyroidism can cause diffuse hair thinning
• Pregnancy and postpartum — Hormonal shifts cause temporary changes in hair cycling

Nutritional Deficiencies

Several nutrient deficiencies are associated with hair loss:

• Iron — Ferritin levels below 30 ng/mL are associated with increased hair shedding (Park et al., 2022)
• Vitamin D — Deficiency is linked to female pattern hair loss and alopecia areata
• Zinc and biotin — Important for keratin synthesis and follicular health
• Protein — Severe protein restriction can trigger telogen effluvium

Diagnosis: Getting to the Root Cause

Accurate diagnosis requires a comprehensive approach:

1. Detailed medical history — Including medication review, dietary habits, stress levels, and family history
2. Scalp examination — Clinical assessment of hair distribution, density, and scalp health
3. Pull test and trichoscopy — Non-invasive assessments of hair shedding and follicular health
4. Blood tests — Full blood count, ferritin, thyroid function, vitamin D, hormonal panel (testosterone, DHEA-S, prolactin)
5. Scalp biopsy — Occasionally needed to differentiate between types of hair loss

“I always tell my patients that hair loss is a symptom, not a diagnosis. Our job is to identify the underlying cause — which may be hormonal, nutritional, autoimmune, or genetic — and then create a targeted treatment plan. The earlier we intervene, the better the outcome.” — Dr. Elena Vasquez, Clinical Director, Axiom Aesthetics

Evidence-Based Treatment Options

Medical Treatments

• Minoxidil (topical, 2-5%) — The only FDA-approved topical treatment for female hair loss. Extends the anagen growth phase and increases follicular blood flow. Available over the counter. Requires consistent daily application for 4-6 months before visible results.
• Spironolactone — An anti-androgen medication used off-label for female pattern hair loss, particularly effective in women with elevated androgen levels or PCOS. Prescription only; not suitable during pregnancy.
• JAK inhibitors (baricitinib, ritlecitinib) — Recently approved for alopecia areata, representing a breakthrough in autoimmune hair loss treatment with response rates of 30-40% at 36 weeks (Marks et al., 2023).
• Low-dose oral minoxidil — An emerging treatment option offering systemic delivery without the inconvenience of topical application. Growing evidence base but used off-label.

Procedural Treatments

• PRP (Platelet-Rich Plasma) — Concentrated growth factors from your own blood are injected into the scalp to stimulate follicular activity. A meta-analysis by Gentile et al. (2021) showed significant improvements in hair density after 3-6 sessions.
• Mesotherapy — Micro-injections of vitamins, minerals, and growth factors directly into the scalp.
• Low-Level Laser Therapy (LLLT) — Red light photobiomodulation to stimulate cellular energy production in follicles. FDA-cleared devices available for home use.
• Hair transplantation — FUE (follicular unit extraction) or FUT (follicular unit transplantation) can be effective for women with stable hair loss and adequate donor hair, though candidacy is more limited than in men.

Nutritional and Lifestyle Interventions

• Correct any identified deficiencies (iron, vitamin D, zinc, biotin)
• Ensure adequate protein intake (minimum 0.8g per kg body weight daily)
• Manage stress through regular exercise, mindfulness, and adequate sleep
• Avoid excessive heat styling, chemical processing, and tight hairstyles
• Use gentle, sulphate-free shampoos and avoid over-washing

When to Seek Professional Help

Consult a specialist if you experience:

• Sudden, rapid hair shedding
• Patchy or well-defined areas of hair loss
• Progressive thinning that has continued for more than 6 months
• Hair loss accompanied by other symptoms (fatigue, weight changes, scalp inflammation)
• Hair loss causing significant emotional distress

At Axiom Aesthetics, we offer comprehensive hair loss consultations including trichoscopic assessment and blood panel recommendations to identify the underlying cause and create a personalised treatment plan.

Frequently Asked Questions

References

1. Messenger, A.G., et al. (2022). “Female pattern hair loss: updated guidelines.” British Journal of Dermatology, 186(6), 999-1010.
2. Park, S.Y., et al. (2022). “Iron status and female hair loss: correlation with serum ferritin.” International Journal of Dermatology, 61(3), 312-318.
3. Marks, D.H., et al. (2023). “JAK inhibitors for alopecia areata: systematic review and meta-analysis.” Journal of the American Academy of Dermatology, 88(1), 128-138.
4. Gentile, P., et al. (2021). “PRP for hair loss: a meta-analysis of randomised controlled trials.” Stem Cells Translational Medicine, 10(5), 712-723.

This article is for informational purposes only and does not constitute medical advice. Always consult a qualified medical professional before undergoing any treatment for hair loss. Individual results may vary.