A nurse is caring for a client with moderate plaque psoriasis. Which nursing intervention should be prioritized to promote skin healing and prevent complications?

Understanding Psoriasis Pathophysiology and Treatment Goals
Psoriasis is a chronic autoimmune skin disorder characterized by the rapid proliferation of keratinocytes, leading to thick, erythematous plaques covered with silvery scales. The underlying pathophysiology involves T-cell mediated inflammation, which disrupts the normal skin barrier function. A key clinical consequence of this barrier disruption is increased transepidermal water loss (TEWL), which exacerbates skin dryness, scaling, and pruritus. Therefore, the primary nursing goals for a client with moderate plaque psoriasis are to reduce inflammation, restore the skin barrier, maintain adequate hydration, and prevent secondary complications such as infection or Koebner phenomenon (the development of new lesions at sites of skin trauma).

Analysis of the Correct Answer: Option 3
The correct intervention is to teach proper application of prescribed topical medications and gentle skin care techniques. This approach directly targets the pathophysiological mechanisms of psoriasis and aligns with the principles of barrier restoration. The provided research by Hsiao et al. (2025) validates this focus by evaluating skin parameters after topical treatment. The study measured stratum corneum hydration and transepidermal water loss (TEWL) as objective indicators of skin barrier function ^[1]. Proper application of prescribed topical agents—such as corticosteroids, vitamin D analogs, or emollients—aims to improve stratum corneum hydration and reduce TEWL, which are critical for healing psoriatic plaques. Gentle skin care, including the avoidance of harsh soaps and aggressive scrubbing, prevents mechanical trauma that can trigger the Koebner response and further compromise the already damaged barrier.

Analysis of Incorrect Options
Option 1: Apply occlusive dressings to all affected areas to maintain moisture. While occlusion can enhance the penetration and efficacy of topical medications and reduce TEWL, it is not a blanket intervention for all affected areas without a specific order. Occlusion increases the potency of topical corticosteroids, which raises the risk of local and systemic side effects, including skin atrophy and adrenal suppression. The priority is teaching the client safe, long-term self-management skills, not applying a technique that requires careful professional judgment to avoid complications.

Option 2: Encourage frequent hot baths with antibacterial soap to prevent infection. This intervention is contraindicated for psoriasis. Hot water and antibacterial soaps are inherently drying and can strip the skin of its natural lipids, significantly increasing TEWL and further degrading the stratum corneum barrier ^[1]. This practice would worsen xerosis, intensify pruritus, and potentially trigger disease exacerbation. Lukewarm baths with added oils or colloidal oatmeal are recommended instead to gently hydrate and debride scales without causing irritation.

Option 4: Recommend complete sun avoidance to prevent skin damage. This advice is overly restrictive and not evidence-based for psoriasis. While sunburn is a known trigger for the Koebner phenomenon and must be avoided, controlled exposure to natural ultraviolet light or physician-directed phototherapy is a well-established treatment for moderate to severe psoriasis. Complete sun avoidance is unnecessary and may deprive the client of a therapeutic modality that can slow keratinocyte proliferation and reduce inflammation.

Clinical Application and NCLEX-RN Focus
For the NCLEX-RN, this question tests the ability to prioritize nursing interventions based on an understanding of disease pathophysiology and patient education. The core of nursing management for chronic skin conditions like psoriasis is empowering the client with the knowledge and skills for effective self-care. This includes teaching correct medication application techniques to optimize therapeutic effects and minimize side effects, as well as reinforcing gentle skin care routines that protect the skin barrier. The study by Hsiao et al. (2025) reinforces that clinical improvement is objectively linked to measurable changes in skin physiology, specifically increased stratum corneum hydration and decreased TEWL, which are the direct outcomes of consistent, proper topical therapy ^[1].