7.2 Hair, Scalp, and Skin Analysis

The bulletin splits hair and scalp analysis and skin analysis as their own treatments sub-topics inside the same 7 of 100 items. You already spent 14 theory questions on histology of the hair and scalp (structure, growth, color, diseases, disorders, loss) and 8 on histology of the skin (structure, melanin, diseases). Analysis is the shop use of that anatomy. HLO is not asking you to recite the vitreous membrane again. It is asking whether you can read density, texture, porosity, elasticity, moisture, growth pattern, scalp type, and skin type before you shampoo, cut, shave, or apply a product.

Why analysis is a separate exam skill

A barber who skips analysis either copies last week's fade onto this week's cowlick or treats every scalp with the same tonic. Both are exam misses. Analysis is also the last chance to see tinea, scabies, open HSV, or impetigo before a blade or brush spreads them. OAR 817-010-0008 still requires hand washing immediately before and after. OAR 817-120-0005 still makes you responsible for an unsafe service.

Connect the counts so you study the right pile. Hair histology (14) tells you that porosity lives in the cuticle and elasticity lives in the cortex. Skin histology (8) tells you that sebaceous glands drive oily shine and that a nick that bleeds has reached at least the papillary dermis. Treatments (7) ask what you do with those facts in the chair. Cutting and styling (11) and shaving (8) assume you already analyzed grain and density. If you study analysis as a product-sales script, you will miss the items that are really safety and design.

Drape first, then look

OAR 817-010-0040 requires a neck strip or towel around the client's neck so a common-use hair cloth or cape never sits on skin. That rule applies when you put a cape on for a look, not only after the first clipper pass. A used neck strip does not go on the next client. Articles that touch skin and cannot be cleaned or disinfected go in a covered waste receptacle immediately. Items that touch skin but do not require disinfection must still be clean.

For analysis, drape so you can still see the hairline, nape, and sideburns. Lift the cape edge. Part the hair with a disinfected tail comb in at least two directions. Do not diagnose from one part. Wash after the look even if you then refuse the haircut.

Hair properties: four tests plus moisture and grain

Chapter 2 already separated the four classic tests. Use them here as service decisions.

Density is the number of hairs per unit area — thin, medium, or thick. It is not strand thickness. Thin density at the crown means a skin fade will stencil every irregularity; leave a little more length or a softer blend. Thick density holds a square form and drinks more product.

Texture is the diameter of the individual strand — fine, medium, or coarse. Fine hair shows clipper marks and collapses without support. Coarse beard hair needs complete softening with steam and lather before a straight razor, or you scrape.

Porosity is a cuticle property: the hair's ability to absorb moisture and product. Compact, smooth scales mean low porosity (product sits on top; do not stack heavy oil on already coated hair). Raised, cracked, or missing scales mean high porosity (drinks water, feels dry after a stripping shampoo, snags on a razor). Average porosity is the textbook middle.

Elasticity is a cortex property: stretch and return. Textbook wet hair with normal elasticity stretches about 40 to 50 percent of its length and returns. Low elasticity means the fiber breaks when you comb wet or pull with a clipper. Handle gently; do not stretch it into place.

Moisture is how dry or oily the shaft and scalp feel today, not the client's story about January. High-porosity dry shafts need water-binding conditioner. Oily shafts need cleansing without pretending a tonic is an antifungal.

Growth patterns — hair stream, whorl, cowlick — set clipper attack and razor grain. Cutting against a crown whorl as if it were a uniform fade leaves a hole. Shaving against a beard stream without reading it leaves ingrowns. Analysis is when you find those patterns, not after the first pass.

Scalp type and skin type

Scalp type is dry, oily, normal, or combination. A dry scalp looks tight, may show small white flakes on intact skin, and stings after a harsh shampoo. An oily scalp shines, mats at the roots, and returns oil hours after washing. Combination often means an oilier crown with a drier nape or hairline — one shampoo choice will not fit both zones. Normal is comfortable, not a medical clearance.

Skin type on the face and neck uses the same dry, oily, normal, and combination language, plus sensitive (reacts with redness to heat, fragrance, or a close shave). That language sits on top of the 8-question skin histology block: sebaceous glands drive oily shine; a thin stratum corneum on dry or recently peeled skin cannot tolerate steam-plus-shave; melanin changes how a nick and post-shave irritation look, not whether you still stop for open lesions.

Sensitive, recently peeled, or isotretinoin-affected skin is an analysis finding. It changes the facial and the shave even when no disease is present.

Disorders you can see without diagnosing

Analysis is also a visual infection-control screen. You are looking for findings that end the cosmetic service:

• Circular scale with broken hairs or black-dot stubble — treat as tinea until a physician says otherwise. Stop. Refer.
• Burrows, intense itch, excoriations that may extend past the scalp — scabies picture. Stop. Refer.
• Open vesicles on the lip or face — open HSV. Stop. Do not shave through them.
• Honey-colored crusts — impetigo picture. Stop. Refer.
• Moving lice or nits — OAR 817-015-0075 discretion, still under Division 10.

Do not treat any of those with a dandruff tonic. Pityriasis flakes on intact skin can still receive a regular shampoo and cut. That distinction was Chapter 3. Analysis is when you make it.

How analysis changes shampoo, cut, shave, and product

Shampoo. Dry or high-porosity hair and a dry scalp get a milder, more conditioning wash and a rinse that does not squeak the cuticle raw. Oily scalp gets more thorough cleansing and a lighter finish — not a chemical peel. Combination scalps may need the shampoo concentrated on the oily zone and a cream rinse on the dry zone. ORS 690.005(2)(a) authorizes shampooing and conditioning; it does not authorize you to clarify through inflamed, open skin.

Cut. Density and growth pattern drive elevation and blend. Thin density plus a cowlick: leave weight where the pattern wants to spring, or the clipper will dig a divot. Coarse, dense hair can support a lower elevation and a harder outline. Fine, thin hair cannot.

Shave. Texture plus grain plus skin type. Coarse, wiry beard on oily, resilient skin can take a full steam, lather, and close shave if the skin is intact. Fine, curly beard on sensitive or melanin-rich skin that already scars needs grain-with, a longer finish, and no scraping. Blood-thinner history from consultation is part of this analysis even though it is not a hair property.

Product. Low-porosity hair rejects heavy oil dressings; use a light tonic or cream. High-porosity dry hair accepts a conditioner or oil treatment. Oily scalp does not need a cream dressing at the roots. ORS 690.005(2)(b) lets you apply hair tonics, dressings, and rinses. Match the product to the analysis, not to whichever bottle is closest.

Medford shop scenario

A Medford client wants a balding crown taken to the skin and a hot-lather shave. Density at the vertex is thin, a crown whorl is obvious, the scalp is dry and intact, and the beard is coarse. Analysis says: do not zero the crown — the whorl and thin density will print every pass; leave a uniform short length. Use a moisturizing shampoo, not a stripping one. For the shave, steam and lather fully because the beard is coarse, but skip a drying alcohol tonic on that already dry scalp. If instead you had seen a ring of scale and broken hairs at that same crown, analysis would have ended the service. No tonic closes tinea.