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Hair Loss Guide · NYC

Why you're shedding, explained straight.

Genetics, DHT, stress, postpartum, iron, thyroid — hair loss has many causes, and the right fix depends entirely on which one you have. Here's how to tell.

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Most common
Genetic (DHT)
Often missed
Iron / thyroid
Reversible?
Depends on cause
First step
Diagnosis

Not all hair loss is the same. Genetic (DHT-driven) loss is permanent and progressive, while shedding from stress, postpartum changes, iron deficiency or thyroid issues is often reversible — which is exactly why getting the diagnosis right matters before any treatment.

The main causes

Each behaves differently and responds to a different plan.

  • +Genetic / DHT — receding hairline, thinning crown; permanent without treatment
  • +Stress & postpartum (telogen effluvium) — sudden diffuse shedding; often reversible
  • +Iron, vitamin & thyroid — correctable medical causes
  • +Traction — from tight styles and extensions

How Folli diagnoses it

We combine a scalp analysis with relevant bloodwork to pinpoint the cause, then recommend the lightest effective plan — medical, regenerative or surgical. If you don't need surgery, we'll tell you.

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They actually diagnosed me instead of selling me surgery. Turned out it was iron — and they fixed it.

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The main categories of hair loss

Most hair loss falls into a few buckets, and they’re treated very differently:

  • +Androgenetic (male/female pattern) — genetic, progressive, the most common by far
  • +Telogen effluvium — temporary shedding after stress, illness, surgery or childbirth
  • +Traction — tension from tight styles, often reversible if caught early
  • +Autoimmune (alopecia areata) — patchy loss needing medical care
  • +Nutritional / hormonal — iron, thyroid and hormonal imbalances, often reversible

Why the right diagnosis changes everything

Because some causes are permanent and others fully reversible, treating the wrong one wastes time and money. Sudden diffuse shedding may just need an underlying issue corrected; gradual patterned thinning is genetic and benefits from early maintenance or a transplant. A scalp analysis distinguishes which is which — the single most useful first step before deciding on any treatment.

Answers

Common questions about Causes of Hair Loss.

Genetic, DHT-driven pattern loss — but stress, postpartum changes, iron deficiency and thyroid issues are common and often reversible.
It depends on the cause. We diagnose first, then recommend the lightest effective treatment.
Not always — many causes respond to medical or regenerative care. We'll tell you honestly.

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