💡 Quick answer
A widening part is often clinical AGA without a biopsy. Photograph; let the specialist decide.
Questions answered here
Histology distinguishes scarring alopecias, areata, and pattern in selected cases. It is not a HairBase millilitre. This page will not invent a PMID. Related: trichoscopy-miniaturization — different URL.
Do not start oral finasteride while waiting for a biopsy unless the prescriber said so. Do not double minoxidil on a fresh punch site.
Spreading redness after a biopsy is surgical/derm care. This is not medical advice.
Try the free self-check →📚 Sources
Sources: AAD ↗
FAQ
Do I need a biopsy for Norwood 3?
Usually a clinical diagnosis. Biopsy is for selected questions.
Does biopsy hurt forever?
It is a procedure with aftercare the clinic explains.
Same as pull-test?
Related exam family, different URL.
More foam to “prepare” for biopsy?
No. Follow the carton if you already use it.
Explore more
Self-check →Treatments →Transplant →Women →New →Hair Loss Causes →Hair-Loss Glossary →Hair-Loss Questions & Answers →Hair-Loss Ingredient Evidence Ratings →Hair Transplant Cost by City →Research →Guides →Browse all →
Not medical advice. General education only; it does not replace diagnosis or treatment by a licensed professional. Figures such as 1 mg or 5% are labelled strengths you may see in your country — not a dosing instruction. Consult a board-certified dermatologist before starting, stopping or changing any treatment.
⚠️ When to see a doctor — don’t self-treat
- Sudden patchy or circular bald spots
- Redness, scaling, pus, pain or itch (possible scarring alopecia — treat urgently)
- Broken hairs or rapid loss
- Loss with body-wide signs (weight loss, fatigue, cycle changes, acne, extra hair)
- Loss right after a new medication
- Any hair loss in a child