Chapter 13: Skin, Hair, and Nails

A critical component of this nursing and medical study guide involves the systematic collection of subjective data, emphasizing the diagnostic importance of patient history regarding pruritus, pigmentation alterations, alopecia, environmental hazard exposure, and dermatological self-care practices. Transitioning into objective data collection, the chapter details vital clinical assessment techniques—inspection and palpation—used to evaluate skin color variations such as erythema, pallor, cyanosis, and jaundice, while also systematically measuring temperature, turgor, moisture, and capillary refill. It thoroughly explores lifespan developmental competencies, contrasting pediatric dermatological presentations like milia, vernix caseosa, and erythema toxicum with geriatric integumentary changes such as xerosis, decreased elasticity, lentigines, and an increased risk for skin tears and pressure injuries (systematically staged from non-blanchable erythema to full-thickness tissue loss). Students and healthcare professionals will find detailed classifications of dermatological pathology, covering the morphology and configuration of primary skin lesions (including macules, papules, vesicles, and wheals) and secondary skin lesions (such as keloids, fissures, excoriations, and ulcers). Furthermore, the chapter extensively outlines abnormal vascular presentations like petechiae, ecchymosis, and purpura, alongside common infectious and inflammatory conditions such as atopic dermatitis, herpes zoster, tinea infections, and pediatric exanthems. Crucially, the text highlights preventive health promotion and oncology screening, focusing on the detrimental impacts of ultraviolet radiation and providing the essential ABCDEF criteria (Asymmetry, Border, Color, Diameter, Elevation, and Funny looking) for the early clinical detection of cutaneous malignancies, including basal cell carcinoma, squamous cell carcinoma, and malignant melanoma, ultimately equipping learners with the core clinical competencies necessary for accurate dermatological evaluation and diagnostic reasoning.