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Hair growth3 minute read

Female hair loss causes: pattern thinning vs shedding

Written by Hi Doctor clinical content teamPublished 26 June 2026

Genetic miniaturisation, temporary shedding, hormones, nutrition and scalp disease require different plans. See how a clinician distinguishes them.

Female hair loss causes: pattern thinning vs shedding, article cover image
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DIRECT ANSWER

An online consultation lets an EU-licensed doctor review your case and, if appropriate, issue an electronic prescription; each pharmacy decides whether it can dispense it.

Doctor reply in under 2 hours

Average doctor reply under 2 hours; at night and on public holidays it can take longer, always within 24 hours. A prescription only if appropriate.

EU-licensed doctors

Every case is reviewed by an EU-licensed doctor.

Electronic prescription

Each pharmacy decides whether it can dispense an approved prescription; some do not accept PDF prescriptions.

HOW IT WORKS

From consultation to collection

  1. 1

    Consultation

    Answer a secure medical questionnaire online.

  2. 2

    Doctor reviews

    An EU-licensed doctor personally assesses your case.

  3. 3

    Prescription only if appropriate

    The doctor replies in under 2 hours on average and issues a prescription only if it is clinically appropriate.

  4. 4

    Collect at the pharmacy you choose

    Take an approved prescription to the pharmacy you choose; each pharmacy decides whether it can dispense it.

“Female alopecia” describes an outcome, not one cause. Hair can become progressively finer, shift into a temporary shedding phase, break from traction or be lost through inflammation. The most useful first distinction is gradual pattern thinning versus sudden diffuse shedding.

Follicle miniaturisation

In female pattern hair loss, genetically susceptible follicles gradually produce finer, shorter hairs. The part widens and density reduces over the crown. Hormones may influence the process, but a standard hormone test is not required for every woman. Irregular periods, acne, increased facial hair or fertility concerns make endocrine review more relevant.

Telogen effluvium

Illness with fever, childbirth, surgery, severe stress, rapid weight loss, nutritional deficiency or a medicine change can push more hairs into the resting phase. Shedding often becomes visible weeks to months after the trigger. It can recover, though it may reveal underlying pattern thinning that was previously subtle.

Other diagnoses

Thyroid disease, iron deficiency and some systemic illnesses may contribute when the history fits. Alopecia areata, traction and scarring alopecias need different care. Buying a supplement without evidence of deficiency can delay diagnosis, and excess of some nutrients can itself worsen hair loss.

When to seek help

Arrange a medical review for sudden shedding, smooth bald patches, scalp pain or scarring, eyebrow loss, signs of infection, or hair loss with fatigue, weight change, heavy periods or new androgen symptoms. Pregnancy, breastfeeding and plans to conceive change which treatments are appropriate. Chest pain, fainting, a racing heartbeat or marked swelling while using a treatment need prompt care.

What to prepare for a medical review

Useful details include the pattern and speed of thinning, recent illness, childbirth, surgery, dieting or stress, menstrual changes, family history, scalp symptoms, hair practices, medicines and supplements. Photos taken in the same lighting and along the same part can help track change more honestly than daily mirror checks.

A calm next step

Bring a timeline that starts three months before shedding became obvious. A clinician can then decide whether the pattern is suitable for remote treatment or needs scalp examination and targeted tests.

Clinical sources used: NHS hair-loss guidance and licensed patient information for topical minoxidil products.

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Written by the Hi Doctor editorial team. General information, not individually reviewed by a doctor.

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