Dermatologic Conditions

Core Concepts

A shared assessment framework

Whatever the condition, the assessment follows the same shape. Inspect the skin in good light: note the location and distribution (localized, widespread, symmetric, along a nerve path), the pattern (linear, circular, ring-shaped), and the individual lesions. Describe each lesion with standard vocabulary: macule (flat color change), papule (small raised bump), plaque (raised flat-topped area), vesicle (small blister), bulla (large blister), pustule (pus-filled bump), nodule (deeper lump). Palpate for warmth, texture, and tenderness. Ask about onset, duration, itching or pain, exposures (new soaps, laundry detergent, jewelry, medications, plants), and personal or family history of skin disease. Document precisely — a picture-quality description in words is what allows another clinician to compare findings over time.

Inflammatory and immune-mediated conditions

Dermatitis is a broad term for skin inflammation. Contact dermatitis happens where skin touches an irritant or allergen (a new detergent, nickel jewelry, poison ivy), usually appearing as red, itchy, sometimes blistered skin limited to the contact area. Atopic dermatitis (eczema) is a chronic, itchy inflammatory condition often beginning in childhood, typically in flexural areas like the inner elbows and behind the knees, and it tends to run in families with allergies and asthma. Psoriasis is a chronic immune-mediated condition in which skin cells turn over too quickly, producing well-demarcated, silvery-scaled plaques, most often on the elbows, knees, scalp, and lower back. These conditions are not contagious; the person's immune system and genetics drive them, and flares can be triggered by stress, skin injury, infections, or weather. Management is individualized and prescribed by the care team; the nurse's role centers on assessment, education about triggers and skin care, and supporting adherence to the plan.

Infectious conditions

• Bacterial: Cellulitis is a deeper skin infection that typically appears as a warm, red, swollen, tender area that can spread quickly, often with fever; it requires prompt medical evaluation. Folliculitis is infection of hair follicles — small, often pus-filled bumps at the follicle openings.
• Fungal: Tinea infections are caused by dermatophyte fungi and are named by location — tinea corporis (ringworm, a ring-shaped scaly patch), tinea pedis (athlete's foot), tinea capitis (scalp). They are contagious by direct contact and thrive in warm, moist environments.
• Viral: Herpes simplex causes cold sores or genital lesions that recur; herpes zoster (shingles) is the reactivation of the chickenpox virus in a person who had chickenpox earlier in life, producing a painful, blistering rash along a single nerve path (dermatome). A person with active shingles blisters can transmit the virus to someone who has never had chickenpox or the vaccine.

Signs that warrant urgent attention include rapidly spreading redness, fever, severe pain, blisters over a large area, or lesions around the eyes — these should be escalated to the care team promptly.

Neoplastic conditions: the skin cancers

The three most common skin cancers arise from different cells. Basal cell carcinoma grows slowly, often as a pearly or waxy bump or a flat, scar-like patch, and rarely spreads to other organs but can destroy local tissue. Squamous cell carcinoma often appears as a firm red nodule or a scaly, crusted patch and is more likely than basal cell to spread if untreated. Melanoma arises from pigment-producing cells (melanocytes); it is the most dangerous because it can spread widely, and early detection dramatically changes outcomes. Public education commonly uses the ABCDE guide for suspicious moles — Asymmetry, irregular Borders, Color variation, Diameter larger than a pencil eraser, and Evolution (changing over time) — but any changing or unusual lesion deserves evaluation, and the guide is a screening reminder, not a diagnosis. Sun exposure history is a major risk factor, so sun protection teaching (shade, protective clothing, sunscreen) is a standard nursing contribution.

The nursing role

For most dermatologic conditions the nurse's work is assessment, education, and support: helping the person understand their condition, apply prescribed treatments correctly (including topical products — often "a thin layer, not a thick smear," applied to clean skin), recognize signs that need re-evaluation, and manage the emotional impact of a visible condition. Contagious conditions require clear, non-judgmental teaching about hygiene and transmission precautions per facility policy. Diagnosis and treatment are the provider's responsibility; the nurse reports findings and supports the plan of care within their scope and institutional protocols.

Common Confusions