Editorial draft for physician review; not medically approved.
Explore when a scalp examination or biopsy may be needed before PRP hair treatment, especially for scarring alopecia and inflammatory hair loss.
Hair thinning is not one diagnosis
Androgenetic alopecia, telogen effluvium, alopecia areata, traction alopecia and inflammatory or scarring disorders can all cause visible shedding. The right diagnosis matters because treatment choices, prognosis and urgency differ. PRP studies largely concern pattern hair loss; results should not be generalized to every form of alopecia.
Warning signs of scarring or inflammatory hair loss
Pain, burning, marked itching, redness, scaling around follicles, pustules, shiny areas without visible follicular openings or rapidly expanding patches deserve prompt assessment. Some scarring alopecias can permanently damage follicles, making early diagnosis and disease control more important than cosmetic procedures.
What an evaluation can include
A clinician may review the timeline of shedding, medications, recent illness, family history, hairstyles and systemic symptoms. Scalp examination, standardized photographs, a hair-pull test, dermoscopy or selected laboratory studies may help. A biopsy is not necessary for everyone; it becomes useful when findings are atypical, inflammatory or uncertain.
Why a biopsy can change the plan
A properly selected scalp-biopsy site can help distinguish active inflammatory or scarring processes from non-scarring hair loss. Pathology must be interpreted in clinical context. PRP should not delay indicated dermatologic treatment for a potentially destructive follicular disorder.
Where PRP fits
For appropriately diagnosed pattern hair loss, PRP may be discussed as an adjunct, with variable protocols and evidence quality. Discuss alternatives such as minoxidil and other established treatments as appropriate. See PRP hair restoration for the service overview; this article addresses diagnostic red flags, not a promise of regrowth.
Frequently asked questions
Can I make treatment decisions from this article?
No. Test interpretation, medication changes and treatment choices depend on individual history, examination and clinician judgment.
What should I bring to an appointment?
Bring relevant prior test results, a complete medication and supplement list, your symptoms and the questions you want answered.
Medical references
- American Academy of Dermatology: Hair Loss Diagnosis
- American Academy of Dermatology: Hair Loss Types
Physician review requested: Do you perform dermoscopy or refer suspected scarring alopecia to dermatology for biopsy?
Suggested clinician-experience insertion: Add a first-person description of your actual diagnostic or follow-up approach here after physician review; no clinical opinion is attributed in this draft.
