Possible signs
- smooth, well-defined patches
- short exclamation-mark hairs
- nail changes in some cases
- eyebrow or eyelash loss in extensive forms
Hair dermatology · São Mateus, Espírito Santo
Alopecia areata explained
Alopecia areata is a condition in which the immune system temporarily targets hair-follicle structures, producing well-defined patches. It can begin at any age and needs medical diagnosis.
Dermatology care
Hair loss deserves diagnosis, not random trial and error
Patches can appear suddenly and vary in size. Some people regrow hair spontaneously; others have recurrent disease or involvement of eyebrows, eyelashes and body hair.
- Diagnosis is clinical and may be supported by trichoscopy. Biopsy or tests are considered for atypical cases or when infection and scarring alopecia must be excluded.
- A clear care plan with follow-up of symptoms and density.
- Care for patients in São Mateus and the Northern Espírito Santo region.
Important: this page is educational and does not replace a consultation, diagnosis or prescription.
Possible presentation
Signs that deserve attention
What may be involved
It is a complex autoimmune disease. Genetics, other autoimmune conditions and environmental factors may contribute; it should not be attributed to a single emotional event.
Appearance alone cannot confirm the type of alopecia. Pattern, timing and symptoms change the investigation.
Evaluation
How diagnosis is built
1
Medical history
Onset, speed, triggers, illness, medicines, styling habits and family history are reviewed.
2
Examination and trichoscopy
Diagnosis is clinical and may be supported by trichoscopy. Biopsy or tests are considered for atypical cases or when infection and scarring alopecia must be excluded.
3
Individual plan
The type and activity of alopecia, together with general health, determine whether tests, biopsy, treatment or monitoring are appropriate.
Care
Treatment depends on the cause
Care depends on extent, age, duration, sites involved and psychosocial impact. Local, injectable or systemic treatments may be discussed with prescription and follow-up.
Address the origin
Correct or control an identifiable trigger whenever possible.
Protect follicles
Reduce inflammation, traction or progression to protect viable follicles.
Follow progress
Compare symptoms, photographs and density over time without promising the same result for everyone.
When to seek an earlier assessment
Extensive patches, eyebrow or eyelash loss, infection, marked scale or rapid progression warrant prompt assessment.
FAQ · common questions
Questions about alopecia areata
01Is alopecia areata contagious?
No. It does not spread from one person to another.
02Does stress cause alopecia areata?
Stress may coincide with onset or worsening, but the disease is autoimmune and should not be reduced to an emotional cause.
03Will the hair grow back?
It may, but the course is unpredictable. Recurrence and new areas are possible, so follow-up matters.
04Does alopecia areata become scarring alopecia?
Alopecia areata usually does not destroy the follicle like scarring forms, but the diagnosis must be confirmed when scarring or inflammation is present.
05Can I use home remedies?
They may irritate the scalp and delay diagnosis. Seek assessment before applying products to the affected skin.
References
Information based on medical sources
- DermNet – Alopecia areata
- Brazilian Society of Dermatology
- American Academy of Dermatology Association – Hair loss
Educational content reviewed for patient communication. It does not replace a medical consultation, diagnosis or prescription.