Women · why is my hair falling out?
Female thinning and shedding, in plain language
A short entry page into the women’s hub.
Not medical advice. Your clinician owns dosing.
In ten seconds. Most female thinning is pattern loss, a sudden shed, or both at once, so the order that works is diagnose first, correct what the labs show, then start minoxidil and add stronger medicines only if they are needed.
If something feels medically urgent (smooth bald patches, a painful scalp, chest pain or swelling on oral minoxidil), contact a clinician rather than waiting on a website.
- Pattern / androgenetic: follicles slowly miniaturize (DHT-sensitive). Wider part and crown, hairline often kept. Often accelerates after menopause as estrogen falls.
- Telogen effluvium (TE): many hairs shift into shed phase ~2–3 months after a hit. Looks diffuse (“handfuls in the drain”).
- Mixed: very common: TE on top of pattern loss. Fixing the trigger helps shed; pattern may still need a growth tool.
- Other lanes: smooth patches (alopecia areata), scarring alopecias, edges from tight styles (traction). Don’t treat these like simple TE.
Evidence: Pattern + TE + scarring distinctions are standard dermatology. Photos + history beat guessing from TikTok.
Do this Same-light photos + a 12-month timeline of body/life hits → pattern types, or patches, pain and edges.
- Acute life stress (grief, job loss, caregiving) is a classic TE trigger, shed often lags 2–3 months, so people miss the link.
- Postpartum TE: often starts ~2–3 months after delivery, peaks ~month 4–5, most improve by 6–12 months. Patience is the main drug.
- Sudden all-over shedding (after illness, birth, crash diet, big stress) usually stops on its own within months once the trigger passes. Hair cycles back.
Do this Track, test, then try, low-risk first → the 12-week sequence · pregnancy and menopause specifics → special situations.
- Ferritin / iron studies: “normal” lab range ≠ always optimal for hair; many hair clinicians prefer higher ferritin targets (exact number debated).
- TSH ± free T4: thyroid under/over activity can shed hair.
- Androgens / PCOS signs: acne, irregular cycles, facial hair + thinning → hormonal evaluation.
- Stop high-dose biotin 48–72h before labs: it interferes with many immunoassays.
Do this Bring the labs checklist to a visit · correct true deficits · don’t start 8 supplements the same day as minoxidil.
- Diagnose first: separate TE / FPHL / mixed / scarring.
- Correct roots: deficits, stress, sleep, diet, inflammation, traction.
- Start minoxidil when miniaturization is present.
- Consider low-dose oral minoxidil if topical fails, irritates, or adherence is poor (after heart screen).
- Add spironolactone if androgen contribution likely and pregnancy is not a concern.
Full follicle cycles need 3–6 months of patience. The rest of the ladder is in the simple path.
Bias map
- Male-centric trials: women (esp. pre-menopausal long-term anti-androgen safety) underrepresented.
- Supplement / MLM: “inflammation blends” are marketing-heavy; prefer third-party tested single ingredients when labs show a deficit.
- Primary care: “labs normal” can end the visit too early.