5.6 Pigmentation, Growths, and Cancer Red Flags
Key Takeaways
- Melanin from melanocytes drives skin color; pigment terms include hyperpigmentation, hypopigmentation, leukoderma, vitiligo, chloasma/melasma, lentigines, nevus, and albinism.
- Post-inflammatory hyperpigmentation (PIH) is a key esthetics concern, especially in deeper skin tones; aggressive exfoliation, picking, and poor sun protection make it worse.
- Screen growths with ABCDE - Asymmetry, Border irregularity, Color variation, Diameter over ~6 mm, Evolution - and refer any changing, bleeding, itching, or nonhealing lesion before treating.
Pigment vocabulary and red-flag thinking
Melanin is the pigment giving skin, hair, and eyes much of their color. Melanocytes in the basal layer produce melanin, and more active melanocytes yield darker skin. Pigmentation appears across physiology, skin analysis, contraindication, and product-selection items, so know the vocabulary and recognize when a spot is no longer just cosmetic.
Pigment terms
| Term | Meaning |
|---|---|
| Hyperpigmentation | Excess pigment / darkening |
| Hypopigmentation | Reduced pigment |
| Leukoderma | Light patches from loss of pigment |
| Vitiligo | Patchy pigment loss (medical diagnosis) |
| Albinism | Congenital absence of melanin |
| Chloasma / melasma | Hormone-related pigment patches ("mask of pregnancy") |
| Lentigines | Small sun- or age-related pigmented spots |
| Nevus | Mole; a pigmented or vascular birthmark/lesion |
| Tan | Temporary melanin increase from UV exposure |
Post-inflammatory hyperpigmentation (PIH)
PIH is darkening that follows irritation, acne, or injury. It matters in esthetics because aggressive treatment can leave lasting marks, especially in deeper skin tones (Fitzpatrick IV-VI). Deeper skin can absolutely receive services - but technique, timing, exfoliation level, heat, and home care must be conservative. Picking, over-exfoliation, and poor sun protection all worsen PIH. Daily broad-spectrum sunscreen is the single most important home-care step after any pigment-focused service.
Growths, ABCDE, and the referral line
Growths demand a different caution. Skin tags, seborrheic keratoses, moles (nevi), warts, and sebaceous cysts may appear during analysis. Some are benign, but estheticians do not diagnose them and do not remove them unless a narrow state scope specifically allows it. Suspicious growths go to a physician or dermatologist before any cosmetic treatment over the area.
The ABCDE melanoma screen
| Letter | Warning sign |
|---|---|
| A - Asymmetry | One half does not match the other |
| B - Border | Irregular, scalloped, or poorly defined edges |
| C - Color | Multiple shades; uneven or unusual color |
| D - Diameter | Larger than ~6 mm (about a pencil eraser) |
| E - Evolution | Changing size, shape, color, elevation, or new symptoms (bleeding, itching, nonhealing) |
Not every concerning lesion fits a perfect rule, so any changing, bleeding, nonhealing, or unusual lesion warrants referral. The esthetician's role is to notice, document objectively, avoid treating suspicious tissue, and direct the client to medical care - never to screen for, diagnose, or rule out skin cancer.
The classic scenario
When a client wants a dark spot lightened: if the spot is stable and non-suspicious, discuss cosmetic brightening within scope, daily SPF, and realistic expectations. If it is irregular, changing, bleeding, crusting, painful, or unlike the client's other marks, refer before treatment. Brightening products are never a substitute for medical evaluation. The same logic applies to a mole that "catches on clothing" - removal is a medical act, so refer.
| Pigment or growth clue | Exam action |
|---|---|
| Stable freckle / lentigo | Analyze as a cosmetic finding |
| Changing, irregular, or bleeding lesion | Refer before treatment |
| Post-inflammatory pigment | Conservative care + daily SPF |
| Mole the client wants removed | Refer to a medical provider |
UV exposure is the major pigment and cancer-risk concept, so reinforce broad sun protection within your role - especially after exfoliation and pigment services - while leaving diagnosis to medicine.
Skin-cancer types, Fitzpatrick, and sun-protection counseling
Estheticians do not diagnose, but the exam expects recognition-level awareness of the three main skin cancers, because noticing a red flag and referring can be life-saving.
| Type | Frequency / risk | Common look (recognition only) |
|---|---|---|
| Basal cell carcinoma (BCC) | Most common; rarely spreads | Pearly or waxy bump, sometimes with a rolled border or central crust that won't heal |
| Squamous cell carcinoma (SCC) | Second most common; can spread | Rough, scaly, red patch or a firm nodule, sometimes crusted or ulcerated |
| Malignant melanoma | Least common but most dangerous | Dark, irregular, changing lesion - the ABCDE target |
The single most important behavior is to treat any nonhealing, bleeding, crusting, or changing lesion as a referral - regardless of whether you can name a type. "It won't heal" and "it keeps changing" are the two phrases that should always push the answer toward medical referral.
Fitzpatrick skin typing
The Fitzpatrick scale classifies skin I-VI by its response to UV light. Types I-II burn easily and tan poorly; types V-VI rarely burn and tan readily. The scale guides service intensity: higher types (IV-VI) carry greater risk of post-inflammatory hyperpigmentation, so exfoliation, peels, heat, and light-based services must be more conservative, while lower types burn faster and need vigilant sun protection. Darker skin is not immune to skin cancer - melanoma in deeper skin tones often appears in less sun-exposed sites (palms, soles, under nails) and is frequently caught late, which is another reason to refer any unusual lesion.
Counseling within scope
Reinforce daily broad-spectrum SPF 30 or higher, reapplication, and sun avoidance during peak hours, especially after exfoliation, peels, or pigment-focused services that leave skin photosensitive. You may educate, recommend sunscreen, and document concerns - you may not claim to screen for or rule out cancer. The recurring exam logic for this section: separate stable, uniform pigment (analyze and treat cosmetically) from asymmetric, irregular, multicolored, growing, bleeding, or nonhealing lesions (document objectively and refer before any treatment over the area).
Brightening products, peels, and cosmetic camouflage are never substitutes for medical evaluation of a suspicious lesion.
In the ABCDE melanoma screen, which letter refers to a lesion changing over time?
What does hyperpigmentation mean?
A client asks you to remove a mole that catches on clothing. What should you do?