Scalp · Assessment

Scalp Diagnosis

How this page was made

This page was written with AI assistance and reviewed against the sources listed under References below. It is general information only, not medical advice. See our full disclaimer for how SHEA creates and reviews treatment information.

What it is

Scalp diagnosis is a visual assessment in which a magnifying camera is used to look closely at the scalp and hair. Images appear on a screen in real time and may be saved so that the same areas can be compared at later visits.

Magnification can make features easier to see than with the naked eye, including scaling, redness, material around follicle openings, differences in hair-shaft thickness and variation between hairs in the same area.

In dermatology, a related technique called trichoscopy uses dermoscopic magnification to examine hair and scalp structures. Trichoscopy can contribute to the evaluation and differential diagnosis of hair and scalp disorders when interpreted in a clinical setting.

Scalp scan and medical trichoscopy are not the same thing

A magnified scalp image can provide useful visual information, but the camera itself does not make a diagnosis. Medical trichoscopy combines magnified examination with clinical history, examination and interpretation by a qualified clinician. A cosmetic scalp assessment should not be treated as a substitute when a medical hair or scalp disorder is suspected.

Why people consider it

To see scalp and hair features that may be difficult to examine with the naked eye
To create a visual baseline before beginning a scalp-care program
To compare the appearance of the same scalp areas across later visits
To help identify findings that may be worth discussing with a dermatologist

What the experience is like

The hair is usually parted and a small magnifying camera is placed on or close to several areas of the scalp. The images are displayed on a screen so that different areas can be viewed and compared.

The person performing the assessment may point out visible features such as scaling, redness, buildup around follicle openings or differences in hair thickness. Some providers save images or repeat photographs at later visits to compare changes over time.

The extent of the assessment varies between providers. A basic cosmetic scalp scan may primarily document surface appearance, while medical trichoscopy performed by a dermatologist can be used as part of a broader clinical evaluation of hair loss or scalp disease.

Limitations & considerations

A magnified image is not a diagnosis by itself. Interpretation depends on the setting, the person examining the images and the other clinical information available
Features such as redness, scaling or material around follicle openings can have more than one possible explanation
Hair-shaft variation can be relevant when evaluating some forms of hair loss, but determining the cause of thinning requires more than simply seeing hairs of different diameters
A cosmetic scalp scan should not be used to rule out a medical condition. Persistent itching, marked inflammation, scarring, sudden or patchy hair loss, or an unusual pattern of hair loss warrants medical assessment
Scalp appearance can vary over time and may be influenced by washing, styling and products applied before the assessment
When images are being used to monitor change, comparison is more useful when similar scalp locations and imaging conditions are used at each visit
A scalp assessment may be offered alongside commercial treatments, so recommendations made from the scan should still be evaluated on their own merits

Evidence note

Trichoscopy is a dermatologic examination technique, not a treatment. Rudnicka and colleagues described videodermoscopy of the hair and scalp as a tool for differential diagnosis of hair loss, with magnification allowing clinicians to examine hair shafts, follicular openings, scaling, pigmentation and other structures that may not be readily visible to the naked eye.

A 2012 clinical review by Miteva and Tosti described trichoscopy as useful for the diagnosis and follow-up of hair and scalp disorders. Specific trichoscopic patterns can help clinicians distinguish conditions including androgenetic alopecia, alopecia areata, telogen effluvium and scarring forms of alopecia.

Trichoscopy has also been studied in inflammatory scalp conditions. In a study of 96 patients with seborrheic dermatitis, commonly observed findings included white scales, thin branching vessels, yellowish areas and red structureless areas. These findings can support clinical assessment but are not necessarily diagnostic when viewed in isolation.

These studies concern trichoscopy used in medical evaluation. They support the usefulness of magnified scalp imaging, but they should not be interpreted as validation of every commercial scalp-analysis system or of diagnoses made from salon-based scans.

References

Peer-reviewed dermatology literature on trichoscopy and scalp assessment.

1. Rudnicka L, Olszewska M, Rakowska A, Kowalska-Oledzka E, Slowinska M. Trichoscopy: a new method for diagnosing hair loss. Journal of Drugs in Dermatology. 2008;7(7):651–654.

Peer-reviewed · Clinical technique review

2. Miteva M, Tosti A. Hair and scalp dermatoscopy. Journal of the American Academy of Dermatology. 2012;67(5):1040–1048.

Peer-reviewed · Clinical review

3. Widaty S, Pusponegoro EH, Rahmayunita G, et al. Applicability of trichoscopy in scalp seborrheic dermatitis. International Journal of Trichology. 2019;11(2):43–48.

Peer-reviewed · Descriptive study · n=96