5.2 Primary and Secondary Lesions

Reading lesion terms like exam clues

A lesion is an abnormal change in skin structure, color, or texture. NIC-style theory questions often describe lesions in words instead of showing an image. If you know the core terms, you can recognize the clue and then apply safety judgment. The test is not asking you to diagnose a disease from a single word; it is asking whether you know what the word means and what risk it may carry during service.

Primary lesions are the first visible changes. A macule is a flat discoloration, such as a freckle. A papule is a small raised bump. A pustule is a raised lesion containing pus. A vesicle is a small blister with fluid. A wheal is a raised, often itchy swelling such as a hive. A nodule is a solid bump that extends deeper than a papule. A tumor is a larger abnormal mass. A cyst is a closed sac that may contain fluid, semifluid, or other material.

Secondary lesions develop when primary lesions change, rupture, heal, become infected, or are scratched. A crust is dried serum, blood, or pus on the surface. A scale is a thin flake of dead epidermal cells. A fissure is a crack in the skin. An excoriation is a scratch or abrasion, often from picking. An ulcer is an open lesion with loss of epidermis and possibly dermis. A scar is fibrous tissue that replaces normal skin after injury. A keloid is a raised, thickened scar that grows beyond the original wound.

For service decisions, surface integrity matters. Intact skin can usually tolerate routine cleansing and gentle analysis better than broken, weeping, crusted, or infected-looking skin. A closed comedo is different from a draining pustule. A flat macule is different from an open ulcer. A dry scale may suggest sensitivity, dehydration, irritation, psoriasis, eczema, or another condition, so the esthetician should analyze carefully and avoid aggressive exfoliation when the skin is inflamed or compromised.

Exam questions may use lesion terms to hide an infection-control issue. Pus, open wounds, weeping fluid, crusting, and unexplained blistering can signal that tools, hands, linens, and products might spread organisms if the service continues. Standard precautions and salon infection-control rules apply to every client, but visible compromised tissue raises the level of caution. When in doubt, avoid the area or refer.

Do not treat lesion memorization as isolated flashcards. Link each term to a service choice. Papule: raised bump, evaluate inflammation. Pustule: pus, avoid pressure and prevent spread. Vesicle: fluid blister, do not rupture. Fissure: crack, avoid exfoliants and irritating products. Excoriation: scratch, protect from contamination and avoid active products. Keloid: history of overgrown scarring, be cautious with services that injure skin.

A clean exam strategy is to translate the term, check whether the barrier is intact, then choose the least risky service decision. If the answer choice says diagnose, prescribe, lance, cut, scrape off, or remove a suspicious lesion, it is usually outside the esthetician role. If the answer choice says document, avoid the area, reschedule, or refer when appropriate, it usually matches client-safety reasoning.