4.2 Melanin and Skin Pigmentation
Key Takeaways
- Melanin is a named Histology of the Skin sub-topic (8 of 100 Oregon Barbering items) and it also changes how nicks, ingrowns, and irritation read on the 8-question Shaving Procedures block.
- Eumelanin is brown-to-black pigment; pheomelanin is red-to-yellow; both are made by melanocytes in the stratum germinativum and transferred into keratinocytes.
- Oregon HLO does not publish a Fitzpatrick scale; use barber language for sensitivity — very fair, easily burned skin shows nicks as high-contrast red, while melanin-rich skin hides nicks but carries higher PIH and keloid risk.
- Post-inflammatory hyperpigmentation after razor burn, stretching, or ingrowns is a pigment response, not a fungus you treat in the chair.
- ORS 690.005(2) keeps the work cosmetic: adapt the shave, do not diagnose pigment disease, and do not use galvanic current to 'even tone.'
The HLO Barbering bulletin lists melanin as its own Histology of the Skin bullet inside the 8-question skin block. Treat that as a stand-alone item and as a shaving item. Shaving Procedures is a separate 8-question domain (areas of the face, technique, steaming and lathering, strokes, finishing). Sixteen theory questions can turn on whether you know what pigment is, where it is made, and how a nick or an ingrown will look on different skin. Pivot Point unit 112B and Milady's skin chapters are the stated sources. Oregon still does not publish a six-type skin-tone chart. Do not tell the Laws & Rules exam that the Board of Cosmetology adopted the Fitzpatrick scale. Use the scale only as barber language for sensitivity, then translate it into shop action.
ORS 690.005(2) keeps pigment work cosmetic. You describe what you see ("the area that was nicked is now darker than the surrounding cheek"). You do not diagnose melasma, vitiligo, or melanoma. You do not promise to "even tone" with a peel or a galvanic pass. Facial and scalp treatments remain limited to cosmetic preparations without galvanic or faradic appliances.
Where melanin is made
Melanin is the pigment that colors skin, hair, and eyes. In skin, melanocytes in the stratum germinativum (basale) synthesize it inside organelles called melanosomes, then transfer those packets into surrounding keratinocytes. Darker-appearing skin typically has more active melanocytes and more widely dispersed melanosomes in the epidermis, not a different set of layers. Lighter-appearing skin typically has less melanin in the keratinocytes, so dermal blood shows through as pink or red. That is why a papillary-layer nick is a high-contrast red flag on fair skin and a darker, slower-changing patch on melanin-rich skin.
Two exam pigments:
- Eumelanin — brown-to-black. Higher eumelanin is associated with deeper visible color and more photoprotection against ultraviolet injury. It is also the pigment that can over-deposit after inflammation.
- Pheomelanin — red-to-yellow. It is the pigment of red hair and of freckled, easily burned complexions. It provides less UV shielding than eumelanin. Clients whose skin and hair are pheomelanin-dominant often burn, show capillaries, and display every nick.
Do not confuse skin melanin with hair melanin from Chapter 2. The same two pigments color the cortex of the shaft, but an Oregon item in this chapter is asking about skin. Gray hair is cortical melanin loss; a pale cheek after a shave is not "canities of the face."
Ultraviolet light is the usual physiologic stimulus for more melanin production (tanning). Inflammation, heat, friction, and wound healing are the shop stimuli that matter to you. A razor burn, a stretch-and-shave pass, an extrafollicular ingrown, or picking a pustule can all leave post-inflammatory hyperpigmentation (PIH) — extra melanin deposited after injury. PIH is not tinea and not a product you sell as a "brightening treatment." Time, stopping the insult, and a physician if the change is unexplained are the honest answers.
Fitzpatrick-style sensitivity, in barber language
Clinics use the Fitzpatrick phototypes I through VI to estimate burning versus tanning. Oregon HLO does not print that scale on the Barbering bulletin, the Laws & Rules bulletin, or ORS 690.005. You may still think in those types so you do not treat every face as the same canvas:
| Barber-language type | Typical burn / tan story | What a close shave shows |
|---|---|---|
| I–II (very fair; often red or blond hair, light eyes) | Burns easily; tans little or not at all | Nicks and erythema are highly visible; heat from towels and friction show as red immediately |
| III–IV (medium, olive, light brown) | Burns moderately or minimally; tans more readily | Irritation may look red then brown; watch for delayed darkening |
| V–VI (brown to deep brown/black) | Rarely or never burns in the textbook sense; tans deeply | A nick may be less obvious as red, but PIH and keloid risk after irritation, ingrowns, or cuts is higher |
Why types I–II nick more visibly
A bleeding nick is still a papillary-dermis event on every client. On very fair skin there is little epidermal melanin to mask hemoglobin. The eye reads a bright red line against a pale field. Clients notice it in the mirror before they leave Tandem Avenue. Steam that is too hot, a dry shave, and an aftershave alcohol slap all produce obvious erythema. Your job is a sharp blade, with-grain first passes, enough lather, and a finishing product that does not further strip the acid mantle. Visible does not mean more blood-borne risk than a nick on dark skin — OAR 817-010-0008 gloves-and-hand-wash rules attach to blood, not to phototype. Visible does mean you will be asked about it, and the 8-question shaving block can test whether you slowed down.
Why melanin-rich skin is not "tougher"
Deeply pigmented skin is not armor. After a close shave, against-the-grain outlining, or stretching the cheek to get extra-close, melanocytes can dump extra eumelanin into the healing epidermis. The client returns with a shadow where the razor burned — PIH. Tightly curled beard hair also has a higher rate of pseudofolliculitis barbae (ingrowns) when the shaft is cut below the skin and curves back into the wall of the follicle. Each ingrown is another inflammatory signal. Keloids — scars that grow beyond the original wound — and hypertrophic scars that stay inside it are both more often discussed in darker skin after nicks, extrafollicular hair, and picking. You do not cut a keloid. You do not shave through a raised scar to "flatten" it. You do not apply a galvanic or faradic device to "break up pigment." You leave more length, shave with the grain, avoid stretching, and refer undiagnosed nodules, spreading darkness, or a changing mole.
Hyperpigmentation after irritation and shaving
Name three shop pictures without diagnosing disease:
- Immediate erythema — red from heat, friction, or a nick. Most obvious on fair skin. Finish gently; do not add alcohol if the barrier is already stripped.
- Delayed darkening (PIH) — brown or gray-brown where the razor, clipper, or ingrown inflamed the germinativum. Most persistent on melanin-rich skin. Stop repeating the same close pass over that patch.
- Hypopigmentation — lighter than surrounding skin after injury or inflammation. Less common after a routine shave than PIH, but still a refer if new, patchy, or unexplained. Do not bleach adjacent skin to match.
None of these is a fungus you treat with an in-shop antifungal. None is a license to perform a superficial or very superficial peel as defined in OAR 817-005-0005. Estheticians, not barbers, hold the chemical-peel rule in OAR 817-015-0055. A finishing lotion, a cool towel, and a changed shave plan are cosmetic. A promise to erase a dark patch is medical advertising you are not authorized to make.
Oregon shop scenario
Two clients sit down in a Portland facility on the same Saturday. The first is very fair, burns in minutes outdoors, and wants a mirror-close neck shave before a wedding. You see every capillary. You use a sharp blade, steam without scalding, lather fully, stay with the grain on the first passes, and stop at the first nick. The red line is obvious; you apply pressure, glove if you will contact blood, finish with a non-stripping cosmetic, and document. The second client has deep brown skin and a history of dark marks after fades. He wants the cheeks taken to the skin against the grain. You already see small dark macules at the jaw from last month's ingrowns. You refuse the extra-close against-grain pass, leave a uniform short stubble, explain that further irritation can darken and scar, and refer the clustered ingrowns if they are pustular. Same 8 histology questions, same 8 shaving questions, two opposite pigment problems, one statute: cosmetic service on intact skin, no diagnosis, no galvanic "tone correction."
Connect the two bulletin lines whenever you study. Melanin is not a color-theory elective. It is why a nick photographs differently, why a close shave is not a universal good, and why OAR 817-120-0005 (safeguard the client) will sometimes mean leaving hair that the client asked you to remove.
Which statement correctly describes melanin as tested on the Oregon Barbering Examination histology-of-the-skin items?
Why do very fair, easily burned clients — Fitzpatrick-style types I–II in barber language, not an HLO-published scale — often show nicks more visibly after a close shave?
After a close, against-the-grain shave, a client with deeply pigmented skin develops dark patches where the razor burned and has a history of raised scars. What should the Oregon barber know?