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Trichology articles from the United States Trichology Institute: what trichology is, hair loss, scalp health, careers and practice building.

Open hair science textbook showing a hair follicle diagram beside a scalp scope

Trichology BasicsOct 4, 202612 min read

What Is Trichology? The Science of Hair and Scalp

What is trichology? A guide to the study of the hair and scalp: definition, word origin, what it covers, who practises it and how it differs from dermatology.

Professional parting a client's hair to show a healthy scalp

Scalp HealthOct 4, 202613 min read

Scalp Health: What It Is and Why It Matters

Scalp health explained with sources: what a healthy scalp looks like, how sebum, barrier, pH and microbiome work, why it matters for hair, and when to refer.

Hairstylist holding a certificate beside a textbook and laptop

Scalp HealthOct 4, 202610 min read

Scalp Health Certification: Courses, Skills and Scope

A scalp health certification teaches beauty professionals scalp science, analysis, product selection and referral. See what a scalp health course covers.

Antique brass microscope and old books beside a modern scalp scope

Trichology BasicsOct 4, 20268 min read

History of Trichology: Origins, Founders, Timeline

The history of trichology, from the Greek word for hair to an 1860s London barbershop, the 1902 founding of the Institute of Trichologists, and trichoscopy.

Scalp HealthOct 4, 20269 min read

How to Improve Scalp Health: A Step by Step Routine

How to improve scalp health in nine sourced steps: how often to wash, how to shampoo, managing flakes, sun care, and when a scalp problem needs a physician.

Researcher viewing a magnified hair shaft with a laboratory microscope

Trichology BasicsOct 4, 20268 min read

Is Trichology a Real Science? Yes: Here Is Why

Is trichology a real science? Yes. Hair and scalp biology is peer-reviewed science, and trained trichologists apply it in a clear non-medical role.

Man scratching his scalp in a barber chair while the barber looks on

Scalp HealthOct 4, 20269 min read

Itchy Scalp Causes: 10 Reasons and When to Refer

Itchy scalp causes explained with sources: the AAD's ten reasons, itch without dandruff, itch with hair loss, itch after coloring, and what a stylist can do.

Woman touching the roots of her hair near the crown

Scalp HealthOct 4, 20269 min read

Oily Scalp: Causes, Care and When to Refer

Oily scalp explained with sources: how sebum is made, what drives oil production, how often to wash oily hair, care approaches, and when to refer a client.

Professional applying a cosmetic scalp scrub along a hair parting

Scalp HealthOct 4, 20269 min read

Scalp Exfoliation: How to Exfoliate Your Scalp Safely

Scalp exfoliation explained: physical vs chemical methods, salicylic acid, how often to exfoliate, who should skip it, and the professional service steps.

Monitor showing a magnified healthy scalp beside a handheld scalp scope

Scalp HealthOct 4, 20269 min read

Scalp Health and Hair Growth: What Research Shows

Scalp health and hair growth: what published research shows and does not show about inflammation, oxidative stress, washing and scalp massage, with sources.

pH test strips beside plain shampoo bottles and a beaker of water

Scalp HealthOct 4, 20269 min read

Scalp pH Explained: Hair, Shampoo and the Acid Mantle

Scalp pH explained with sources: the pH of the scalp and hair shaft, what shampoo pH does to the cuticle, the acid mantle, chemical services and common myths.

Hairstylist gently combing a relaxed client's hair at a salon station

Scalp HealthOct 4, 20269 min read

Scalp Psoriasis: A Stylist's Guide to Spot and Refer

Scalp psoriasis explained for stylists: what it looks like, how it differs from dandruff and seborrheic dermatitis, coloring, hair loss and when to refer.