A nurse is providing education to a client who has discoid lupus erythematosus. Which of the following statements made by the client indicates understanding of how to prevent exacerbation of skin rashes?

Choice A rationale Washing hands before touching skin is a fundamental practice for infection control, preventing the introduction of pathogens to compromised skin. While essential for overall hygiene, it is not the primary action specifically targeted at preventing the exacerbation (flare-up) of the photosensitive rash characteristic of discoid lupus erythematosus. Choice B rationale Discoid lupus erythematosus (DLE) is a chronic inflammatory disorder where photosensitivity is a major trigger for the characteristic skin lesions. Ultraviolet (UV) radiation, from the sun or tanning beds, directly damages keratinocytes, which then express autoantigens and trigger an inflammatory, autoimmune response. Applying broad-spectrum sunscreen blocks this UV radiation, preventing the cellular damage and subsequent rash exacerbation. Choice C rationale Regular exercise promotes general health, improves circulation, and reduces stress, which may indirectly support the immune system. However, exercise is not the specific, direct, or primary intervention required to shield the skin from the known environmental trigger of UV radiation that causes flare-ups of discoid lupus lesions. Choice D rationale Adequate sleep, typically 7-9 hours for adults, supports general immune function and physical restoration. While important for managing any chronic illness, it does not offer direct, specific photoprotection or block the ultraviolet exposure that is the major, direct, and well-established physical trigger for the cutaneous inflammation characteristic of DLE.