Hair and Scalp Analysis and Client Consultation

Why Hair and Scalp Analysis Matters

Before you pick up a pair of shears, mix a color formula, or apply a relaxer, you must understand the hair and scalp you are working on. Skipping this step is not just poor technique—it can cause serious injury to your client and expose you to professional liability. State licensing boards require cosmetologists to recognize contraindications and to document client information accurately. A thorough analysis and a complete consultation card protect both the client and your license.

The Four Properties of Hair

Texture

Hair texture describes the diameter of a single strand. It is classified as fine, medium, or coarse.

• Fine hair has a small diameter. It is easily damaged, processes chemical services quickly, and can become limp with heavy products.
• Medium hair is the most common and responds predictably to most services.
• Coarse hair has a large diameter, a strong cortex, and often requires longer processing time or stronger solutions to achieve the desired result.

To assess texture, roll a single dry strand between your fingers. Fine hair is barely felt; coarse hair feels like thread.

Porosity

Porosity is the hair's ability to absorb and retain moisture. It is determined by the condition of the cuticle layer.

• Low porosity: Cuticle scales lie flat and tightly closed. The hair resists absorption of water and chemicals, requiring longer processing times.
• Normal (medium) porosity: Cuticle is slightly raised and absorbs moisture evenly. Most services process predictably.
• High porosity: Cuticle is raised, lifted, or damaged. The hair absorbs liquids rapidly but loses them just as fast. High-porosity hair can over-process quickly and may produce uneven color results.

A simple field test: place a few strands in a glass of water. Hair that sinks quickly has high porosity; hair that floats has low porosity. This is a general screening tool, not a laboratory measurement.

Elasticity

Elasticity is the hair's ability to stretch and return to its original length without breaking. It reflects the strength of the cortex and its disulfide bonds.

• Normal elasticity: A wet strand stretches up to about 50% of its length before returning to its original shape.
• Low elasticity: The strand breaks with little stretching, indicating a weakened cortex. Chemical services such as relaxers or permanent waves can cause further breakage on hair with low elasticity.

To test: wet a single strand, hold each end, and gently stretch. Note whether it returns or breaks.

Density

Density refers to how many hairs grow per square inch of scalp—it is about the number of follicles, not the size of individual strands. Fine hair can be dense; coarse hair can be sparse. Density affects sectioning, product amount, and tool selection during cutting and chemical services.

Identifying Common Scalp Conditions

A scalp assessment is performed before every chemical service and before any scalp treatment. Use a magnifying lamp and the handle of a tail comb to gently lift sections without touching the scalp. Never perform services on an irritated or compromised scalp.

Contraindications: Do Not Proceed

The following conditions require you to decline the chemical service and refer the client to a physician:

• Tinea capitis (ringworm of the scalp): A highly contagious fungal infection. Visible as scaly, circular patches, sometimes with hair loss. Do not perform any service; the infection can spread to you, other clients, and equipment.
• Open abrasions, cuts, or sores: Broken skin allows chemicals to enter the bloodstream and creates an infection risk.
• Pediculosis capitis (head lice): Active infestation is a strict contraindication. The salon must also be sanitized.
• Carbuncles or furuncles (severe bacterial infections/boils): Active infection; chemical services are prohibited.

Proceed-with-Caution Conditions

Some conditions allow a modified service with extra care:

• Psoriasis: A non-contagious autoimmune condition producing silvery scales and red patches. It is not contagious, but chemical solutions can irritate inflamed areas. Patch test and avoid broken or severely inflamed areas. Document the condition and obtain client acknowledgment.
• Dandruff (pityriasis): Mild, flaky scalp condition. Light dandruff alone is not a contraindication, but inflamed or broken skin is.
• Seborrheic dermatitis: Inflammatory condition with greasy scales. Avoid chemical services on actively inflamed areas; consult your instructor or a licensed professional for borderline cases.

Rule of thumb: If the scalp has any break in skin or any sign of a contagious condition, do not perform the service. When in doubt, refer out.

Completing the Client Consultation Card

A consultation card is a legal record. Every field must be complete, legible, and dated. The seven required analysis fields in this program are:

1. Hair texture (fine / medium / coarse)

2. Hair porosity (low / normal / high)

3. Hair elasticity (normal / low)

4. Hair density (sparse / medium / dense)

5. Scalp condition (normal / condition noted with description)

6. Service history (previous chemical services, timing, products if known)

7. Client health notes (allergies, medications affecting scalp or hair, pregnancy if disclosed)

Also record the results of any patch test performed for color services, along with the date and the client's signed acknowledgment.

Safety Reminders

• Always perform a patch (predisposition) test at least 24–48 hours before applying aniline-derivative color products, following manufacturer directions.
• Never apply a chemical service to a scalp with open sores, active infection, or excessive inflammation.
• Wear gloves during scalp examination if you see any skin lesions.
• Document everything. If it is not written down, it did not happen—both professionally and legally.