Why Hair Loss Treatment Requires Identifying the Cause First
A shampoo for thinning hair addresses product build-up at the follicle. It does not address a thyroid disorder causing diffuse shedding. A topical minoxidil solution stimulates follicle activity. It does not address the nutritional deficiency causing the follicle to produce thinner hair.
Treating the wrong cause produces no results and delays the correct treatment. The first step for any significant hair loss is identifying which type is occurring.
The Five Main Causes of Female Hair Loss
Type 1: Female Pattern Hair Loss (Androgenetic Alopecia)
Who it affects: The most common form of hair loss in women. Affects approximately 40% of women by age 50.
What it looks like: A widening centre parting with diffuse thinning across the top of the scalp. The hairline is usually preserved (unlike male pattern baldness). Progresses slowly over years.
Cause: Genetic sensitivity of hair follicles to dihydrotestosterone (DHT), a testosterone derivative that shortens the hair growth cycle and produces progressively thinner, shorter hairs.
Evidence-based treatments:
- Minoxidil 2% or 5% topical solution: The most well-evidenced treatment for female pattern hair loss. Applied directly to the scalp twice daily. Results become visible at 4 to 6 months and require continuous use; stopping minoxidil reverses the improvement within 3 to 6 months.
- Finasteride (oral): Approved for male pattern hair loss; used off-label for women in some countries. Not suitable during pregnancy.
- Low-level laser therapy (LLLT): FDA-cleared devices (combs, caps) show moderate evidence for stimulating follicle activity in androgenetic alopecia.
Type 2: Telogen Effluvium (Stress-Related Shedding)
Who it affects: Anyone who has experienced a significant physical or psychological stressor in the previous 2 to 4 months.
What it looks like: Diffuse, even shedding across the entire scalp. Handfuls of hair coming out during washing or brushing. Visible thinning across the scalp rather than concentrated at the top.
Cause: A shock to the system (surgery, illness, childbirth, severe psychological stress, extreme weight loss, high fever) causes a large proportion of hair follicles to simultaneously enter the telogen (resting and shedding) phase. Hair loss appears 2 to 4 months after the triggering event.
Why this is important: Telogen effluvium is the most common cause of sudden-onset hair loss and it typically resolves on its own within 6 to 9 months of the trigger being removed, without treatment. Spending on hair growth products during this recovery period provides no benefit.
Treatment: Address the trigger. If the trigger was nutritional (see below), correct the deficiency. Otherwise, support hair health through adequate protein and iron intake and wait for the natural recovery cycle to complete.
Upload a photo of your scalp and hair or describe your hair loss pattern, timeline and any recent health changes. The Hair Analyzer identifies which hair loss type your pattern most closely matches and recommends whether professional assessment is needed.
Analyse My Hair LossAsk a Hair Loss QuestionType 3: Nutritional Deficiency Hair Loss
Most common deficiencies causing hair loss:
- Iron deficiency (serum ferritin below 30 ng/mL): The most common nutritional cause in women
- Vitamin D deficiency: Follicle receptor impairment
- Zinc deficiency: Follicle repair and oil gland function
- Protein inadequacy: Keratin production reduction
What it looks like: Diffuse thinning across the scalp. Hair shaft diameter decreases. Shedding increases. Often accompanied by fatigue, cold sensitivity (iron deficiency) or other systemic symptoms.
Treatment: Identify the specific deficiency through blood testing. Correct through dietary change and supplementation. Hair improvement becomes visible 3 to 6 months after deficiency correction.
The key rule: Do not supplement iron without confirming deficiency first. Excess iron is toxic. Test serum ferritin and haemoglobin before starting iron supplementation.
Type 4: Traction Alopecia
Who it affects: Women who wear tight hairstyles consistently: high ponytails, tight braids, extensions attached under significant tension.
What it looks like: Hairline recession at the temples and along the frontal hairline. Smooth skin where hair has been lost (no scarring initially). Small follicular pustules may appear during active traction.
Cause: Repeated mechanical pulling at the follicle base causes inflammation, then fibrosis (scarring) of the follicle over time.
Critical point: Early traction alopecia is reversible if the tension source is removed before scarring occurs. Late-stage traction alopecia with fibrosis is permanent. The distinction between early and late-stage requires a dermatologist assessment.
Treatment: Remove or significantly reduce the tension from hairstyles immediately. For early-stage: the follicles recover within 6 to 12 months of tension removal. For established cases: topical minoxidil and anti-inflammatory treatments support recovery but cannot fully reverse scarring.
Type 5: Alopecia Areata
What it looks like: Smooth, circular or oval patches of complete hair loss. The skin in the patches is smooth and normal (no scarring). Patches appear suddenly and grow over weeks.
Cause: An autoimmune condition where the immune system attacks hair follicles. Genetic; associated with other autoimmune conditions (thyroid disorders, vitiligo).
Treatment options: Topical or injected corticosteroids (most common treatment for limited patches), JAK inhibitors (baricitinib; FDA-approved in 2022 for alopecia areata), topical minoxidil (supportive). Spontaneous remission occurs in approximately 50% of mild cases within one year.
When to See a Dermatologist
See a dermatologist (not just your GP) for hair loss if:
- Hair loss is progressing rapidly
- Scalp shows inflammation, scaling or visible lesions
- Hairline recession is visible
- Hair loss patches are smooth and perfectly circular
- You have tried addressing nutritional deficiencies without improvement after 6 months