Hair Loss in Women: Causes, Diagnosis and Treatment

Hair loss in women is common and most often caused by female pattern hair loss, temporary shedding after a trigger such as childbirth or illness, iron deficiency or thyroid problems. Unlike in men, it usually shows as diffuse thinning on top of the head and a widening parting rather than bald patches. With the right diagnosis, most women can slow the loss and many regain some density.

In short: See a doctor early and have your blood checked. Treat any deficiency first. For female pattern hair loss, minoxidil is the first-line treatment; a transplant can help if the thinning is limited to a defined area.

Common causes of hair loss in women

Female pattern hair loss

Female pattern hair loss (androgenetic alopecia in women) is the most common cause and affects up to 42% of women ^[2]. Follicles on the top of the head gradually shrink and produce finer, shorter hairs. Typical signs:

• the parting becomes wider
• the scalp shows through on top, especially under bright light
• the front hairline usually stays intact ^[1]
• the ponytail feels thinner

The severity is described by the Ludwig scale. See Ludwig 1 and Ludwig 2 for what each stage looks like. Genes play a role, and hormones can make it worse, but many women with this pattern have normal hormone levels ^[1].

Telogen effluvium

Many women experience sudden, diffuse shedding two to three months after a trigger:

• childbirth (postpartum hair loss)
• a high fever, infection or surgery
• crash diets or rapid weight loss
• severe stress
• stopping the contraceptive pill

The follicles stay intact and the hair usually recovers within six to twelve months. If shedding lasts longer, there may be an ongoing cause.

Deficiencies and thyroid problems

Low iron stores (ferritin) are common in women who menstruate and can contribute to hair loss. Thyroid disorders, both under- and overactive, are another frequent cause. Both are easy to test and treat.

Hormonal causes

• Polycystic ovary syndrome (PCOS): higher androgen levels can cause thinning on the scalp together with acne, irregular periods or excess facial and body hair.
• Menopause: falling oestrogen levels often unmask or accelerate female pattern hair loss.
• Hormonal contraception: some progestins with androgenic effects can worsen thinning in sensitive women.

Other causes

• Traction alopecia from tight ponytails, braids or extensions, typically at the temples
• Alopecia areata, causing round bald patches
• Frontal fibrosing alopecia, a scarring condition that pushes back the hairline, most often after menopause; this needs early dermatological treatment
• Medication, such as some antidepressants, blood thinners or chemotherapy

For an overview of all forms, see our guide to hair loss causes and treatment.

Diagnosis: what to expect

In Switzerland, start with your GP or gynaecologist, or a dermatologist if your insurance model allows direct access. The investigation is generally covered by basic health insurance, subject to your deductible.

Step	What is checked
History	Onset, family history, pregnancies, cycle, diet, stress, medication
Examination	Pattern of thinning, pull test, signs of excess androgens
Trichoscopy	Miniaturised hairs, inflammation, signs of scarring
Blood tests	Ferritin, blood count, TSH; sometimes vitamin D, zinc
Hormones	Testosterone, DHEAS and others if PCOS or excess androgens are suspected
Biopsy	Only if the cause remains unclear or scarring is suspected

Some private hair clinics bundle trichoscopy, blood and hormone tests into a single appointment, for example the hair loss treatment for women at Mara in Zurich. This is self-paid, whereas the investigation through your GP is covered by basic insurance.

Female hair loss treatment

Correcting the cause

If tests show low iron, a thyroid disorder or another deficiency, treating it comes first. Hair usually takes several months to respond after levels are corrected.

Minoxidil

Minoxidil is the first-line treatment for female pattern hair loss ^[1,2]. In trials, women using it were about twice as likely to report moderate to marked regrowth as those on placebo ^[3]:

• Topical: 2% solution twice daily or 5% foam once daily, available without prescription in Swiss pharmacies
• Oral, low-dose: about 0.625 to 2.5 mg a day, prescribed off-label

Expect increased shedding in the first weeks and judge the effect after six to twelve months. A common side effect, especially with oral minoxidil, is extra facial or body hair ^[4]. What the studies show on dosing and safety of the tablets is summarised in our guide to low-dose oral minoxidil. Minoxidil must not be used during pregnancy or breastfeeding.

Spironolactone

Spironolactone is a diuretic with anti-androgenic effects. It is prescribed off-label for female pattern hair loss, particularly when there are signs of excess androgens ^[1]. Studies suggest it helps, especially combined with minoxidil, though high-quality trials are still lacking ^[5]. Important points:

• it must not be taken during pregnancy, so reliable contraception is needed
• blood pressure and potassium levels should be monitored, especially at the start
• possible side effects include irregular bleeding, breast tenderness and dizziness

Hormonal contraception

For some women, a combined pill with an anti-androgenic progestin can help, especially with PCOS. This is a decision for your gynaecologist, weighing hair benefits against the known risks of hormonal contraception, such as blood clots.

PRP and other add-ons

PRP injects growth factors from your own blood into the scalp. Small studies suggest it can modestly improve density ^[6], and it is often combined with minoxidil. Low-level laser devices and microneedling have some supporting evidence as add-ons.

Finasteride is not approved for women and must never be taken by women who are or may become pregnant. Some doctors prescribe it off-label after menopause, although at 1 mg it was no better than placebo in trials in women ^[3].

Is a hair transplant suitable for women?

A hair transplant can work well for women, but suitability needs a careful assessment. Good candidates usually have:

• thinning limited to a defined area, such as the parting, front or temples
• a dense, stable donor area at the back of the head
• hair loss that has been stabilised with medication
• a specific cause such as traction alopecia, a high forehead or scars

It is less suitable for diffuse thinning across the whole scalp, including the back, because the donor hair may be affected too. Active alopecia areata or scarring alopecia must be treated and stable first.

Many women prefer a non-shaven FUE technique so the procedure stays discreet. More on suitability, methods and costs on our page about hair transplants for women.

When to see a doctor

See a doctor promptly if:

• hair loss is sudden or patchy
• the scalp is itchy, painful, red or scaly
• your hairline is receding, especially with eyebrow loss
• you also have irregular periods, acne or excess facial hair
• you feel unusually tired, cold or have lost or gained weight

Swiss hair clinics can combine diagnosis, a treatment plan and, if needed, a transplant, with aftercare close to home. Compare specialists in our clinic comparison.