Final answer:
The client receiving dexamethasone should report any symptoms of infection, such as new or worsening redness, swelling, or pus-filled blisters, and be mindful of proper wound care.
Step-by-step explanation:
The nurse should explain to the client with atopic dermatitis that they must report any symptoms of infection to their healthcare provider immediately. Because dexamethasone is an immunosuppressant, it can increase the risk of infection. Warning signs might include new or worsening redness, swelling, warmth, pain, pus-filled blisters, fever, or any other signs of infection. The client should be instructed on proper wound care for any breaks in the skin and advised to observe closely for any changes that could indicate an infection, as the corticosteroid can mask symptoms and delay healing.