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Alopecia Areata Incognita

Diffuse, rapid-onset hair loss without classic patchy areas; an uncommon variant of alopecia areata mimicking telogen effluvium and androgenetic alopecia, more common in young women.

Written by: Saygı Hospital Health Guide Editorial Board
Last updated:

This content has been compiled by the Saygı Hospital Health Guide Editorial Board and is periodically reviewed by a specialist physician.

This content is for informational purposes only and does not constitute medical advice. You can book an appointment at our Dermatoloji department. Book Appointment →

What is Alopecia Areata Incognita?

Alopecia areata incognita (AAI) is a diffuse non-scarring autoimmune alopecia, considered a clinical variant of alopecia areata (AA) without the classic well-demarcated bald patches.

It typically affects young women (20-40 years) with rapid, profuse hair shedding over weeks to months, mimicking acute telogen effluvium or female pattern hair loss.

Diagnosis is confirmed by trichoscopy (yellow dots, vellus hairs, short regrowing hairs, exclamation mark hairs) and scalp biopsy showing peribulbar lymphocytic infiltrate. Prognosis is generally favorable with rapid regrowth on corticosteroids.

Symptoms

Sudden diffuse hair shedding (>200 hairs per day)
Reduction in hair density without distinct bald patches
Increased shedding noted on combing or shower
Short, fragmented regrowing hairs on trichoscopy
Yellow dots and exclamation mark hairs on dermoscopy
Possible nail involvement (pitting, ridging, trachyonychia)
Sometimes preceded by physical or emotional stress

Risk Factors

Female sex, young adult (20-40 years)
Personal or family history of autoimmune disease (thyroid, vitiligo)
Atopic background (eczema, asthma, allergic rhinitis)
Recent severe stress, illness, surgery, or postpartum
Iron deficiency or vitamin D deficiency may exacerbate
Genetic predisposition (HLA-DR, HLA-DQ alleles)
Hormonal changes or thyroid dysfunction

When to See a Doctor?

If you experience any of the following symptoms, seek medical attention promptly:

  • Sudden onset diffuse hair shedding lasting more than 2 weeks
  • Visible reduction in hair density
  • Hair shedding accompanied by nail changes
  • Family history of alopecia areata
  • Associated autoimmune symptoms (thyroid, vitiligo)
  • No improvement after correcting iron, vitamin D, thyroid status
  • Need for trichoscopy or scalp biopsy for diagnosis

Treatment Methods

01
Trichoscopy (dermoscopic examination) for diagnosis
02
Scalp biopsy with horizontal sections in atypical cases
03
Topical or intralesional corticosteroids (triamcinolone acetonide 5-10 mg/ml)
04
Topical minoxidil 5% adjuvant
05
Topical immunotherapy (DPCP, SADBE) for refractory cases
06
JAK inhibitors (baricitinib, ritlecitinib) for severe/refractory disease
07
Iron, vitamin D, zinc, thyroid evaluation and supplementation

Which Department to Visit?

You can visit our Dermatoloji department for these complaints. Our specialist physicians will create the most suitable treatment plan for you.

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Health Disclaimer: The information on this page is prepared for general informational purposes only. It does not replace medical diagnosis and treatment. Please consult your physician for your complaints. Saygı Hospital does not accept responsibility for actions taken based on the information on this page.