4.3 Primary & Secondary Skin Lesions and Service Contraindications
Key Takeaways
- A primary lesion is the first change to appear in the skin: macule, papule, vesicle, bulla, pustule, wheal, tubercle, nodule, tumor, and cyst
- A secondary lesion develops later, once a lesion ruptures, dries, is scratched, or heals: scale, crust, excoriation, fissure, ulcer, scar, and keloid
- A vesicle is a clear-fluid blister under 1 cm, a bulla is the same blister over 1 cm, and a pustule is an inflamed papule with a white or yellow pus center
- Acne is graded I to IV: Grade I is mostly open comedones, while Grade IV is cystic acne with deep inflammation and scarring that a barber refers to a dermatologist
- 16 TAC 83.102(b) bars service when a practitioner has reason to believe the client has a contagious condition, inflamed, infected, broken or swollen skin, or an open wound or sore in the service area
Quick Answer: A lesion is any structural change in the skin's tissue. Primary lesions are the first change to appear. Secondary lesions develop later, once a lesion ruptures, dries, is scratched, or heals. Barbers name what they see to decide whether to proceed, work around it, or refuse and refer — never to diagnose.
Section 4.2 named the disorders; this section teaches the vocabulary the exam uses to describe them. An item that says "a raised, inflamed lesion with a yellow center" wants you to name a pustule and act — never to diagnose, and never over broken skin.
Primary Lesions
A primary lesion is the initial change — a different color from the skin around it, raised above it, or fluid-filled.
| Primary lesion | Definition | Barbershop example |
|---|---|---|
| Macule | Flat spot or discoloration, not raised or sunken | Freckles, age spots |
| Papule | Small raised pimple, no fluid | Early acne bumps |
| Vesicle | Blister under 1 cm, clear fluid | Early herpes simplex |
| Bulla | Blister over 1 cm, clear fluid | Burn or friction blister |
| Pustule | Inflamed papule with a pus center | Infected follicle |
| Wheal | Itchy swollen area fading within hours | Hives, insect bite |
| Tubercle | Solid rounded lump larger than a papule | Firm lump under the jaw |
| Nodule | Solid mass over 1 cm below the surface | Deep bump at the nape |
| Tumor | Abnormal cell mass, varied size and color | Large growth — refer |
| Cyst | Closed sac of fluid, pus, or semi-fluid matter | Sebaceous cyst on the scalp |
Never lance or squeeze any of them — a torn cyst turns a haircut into an exposure incident (Section 4.3).
Secondary Lesions
A secondary lesion appears after a primary lesion ruptures, dries, is scratched, or heals.
| Secondary lesion | Definition | Barber's read |
|---|---|---|
| Scale | Thin dry or oily plates of shed flakes | Dandruff, psoriasis — serve |
| Crust | Dried sebum, pus, and cells over a wound | Honey-colored crust — refuse |
| Excoriation | Raw abrasion from scratching | Broken skin — do not shave |
| Fissure | Crack penetrating the dermis | Split lip corners — avoid |
| Ulcer | Open lesion with loss of skin depth | Refuse and refer |
| Scar (cicatrix) | Fibrous tissue formed after healing | Work around it |
| Keloid | Thick raised scar from excess fibrous tissue | Adjust technique |
The exam's favorite split is vesicle versus crust: the intact blister is primary, the scab it dries into is secondary.
A client's temple shows a small blister filled with clear fluid where hair tint ran onto the skin. How is this lesion classified?
Inflammations and Common Conditions
Dermatitis is any inflammatory condition of the skin. Contact dermatitis — from an irritant or allergen touching the skin — is the most common occupational skin problem for barbers: tint, developer, and disinfectant leave redness, itching, and vesicles exactly where the product sat. Gloves and a predisposition test prevent it. Seborrheic dermatitis is red, irritated skin with greasy yellowish scale where sebaceous glands are dense.
Eczema is chronic inflammation with dry or moist itching lesions; not contagious, but never shave over broken patches. Psoriasis shows red patches under silvery-white scale — serve, but never scrape the plaques, which causes pinpoint bleeding.
Acne, a disorder of the sebaceous glands, is graded I to IV. Grade I is mostly open comedones with a few papules — serve normally. Grade II adds many closed comedones and occasional pustules — keep pressure off them. Grade III is red and inflamed with many papules and pustules — work around, no close shave. Grade IV is cystic acne with deep inflammation and scarring — refuse the shave and refer to a dermatologist. A comedo is hardened sebum plugging a follicle: an open comedo (blackhead) oxidizes dark at the surface, a closed comedo (whitehead) stays trapped beneath it. Milia are pearl-like masses of sebum and dead cells under the skin. Barbers extract none of them.
Rosacea is chronic redness of the cheeks and nose with dilated capillaries and sometimes pustules. Heat and friction worsen it: skip the extra steam towel, use lukewarm water, and keep razor pressure light.
A regular shave client has persistent redness and visible capillaries across the cheeks and nose, with a few papules. How should you adapt the service?
Hypertrophies and Pigmentation
A hypertrophy is an abnormal growth of skin. Most are harmless; one is not.
- Verruca (wart) — caused by human papillomavirus and contagious. Never shave across one; disinfect anything that touched it.
- Keratoma (callus) — thickened epidermis from repeated pressure or friction. Harmless; work around it.
- Mole (nevus) — a tan-to-black spot, flat or raised, sometimes bearing hair. Cut around it, never across, and never pull hair from it.
The ABCDE cue tells you when a mole is worth mentioning: Asymmetry, irregular Border, uneven Color, Diameter over a pencil eraser, Evolving.
Pigmentation terms are pure vocabulary: lentigines are freckles, chloasma is larger flat patches of increased pigment (liver spots), vitiligo is acquired patchy white skin that burns easily, and albinism is a congenital absence of melanin giving white hair and pinkish, light-sensitive skin. None is contagious.
While cutting a neckline you find a raised brown growth with two hairs in it, sitting directly on the line you were about to outline. What is the correct action?
The Decision Rule: Proceed, Work Around, or Refuse
Every observation collapses into one of three actions:
- Proceed. Intact, non-contagious, nothing open — dandruff scale, psoriasis plaques, a healed scar, freckles, vitiligo, Grade I acne.
- Work around it. Localized and non-contagious — a mole, skin tag, callus, single pustule, Grade III acne. Keep tools clear and service the rest.
- Refuse and refer. Anything contagious, anything open or weeping (ulcer, excoriation, ruptured cyst), and anything you cannot identify.
Texas puts step three in the rules: 16 TAC §83.102(b) bars service when a practitioner has reason to believe the client has a contagious condition, inflamed, infected, broken, raised, or swollen skin, or an open wound or sore in the service area. Reason to believe, not certainty — you never need a diagnosis to decline.
Refusing Without Diagnosing
Say what you see, not what it is, then hand the client a route forward:
"I'm seeing irritation and an open spot along your jaw. State rules don't let me work over broken skin, so I'd rather not shave you today. Get it looked at and come back once it's healed."
No disease is named and the booking survives. Then wash your hands, disinfect what the client touched, and note the refusal on the client record.
Keloids and the Close Neck Shave
A keloid is a scar in which fibrous tissue keeps growing past the boundary of the original wound, leaving a raised, firm mass. Keloids form disproportionately in clients with deeply pigmented skin, and the highest-risk zone is where barbers work hardest — the nape and posterior hairline, where repeated close outlining irritates follicles (acne keloidalis nuchae). Keep the blade off a nape that already shows firm bumps, soften the outline with a trimmer, and never shave over a keloid.
A client with deeply pigmented skin has firm, raised bumps along the posterior hairline that have spread beyond the edges of old razor bumps. What is the best response?