A nurse is planning care for a client who has urolithiasis. Which of the following actions should the nurse take?

A. Encourage intake of at least 3 L of fluids per day: Increasing fluid intake helps dilute the urine, reduces urinary stasis, and promotes the passage of stones. Adequate hydration is a cornerstone of both treatment and prevention of further stone formation in clients with urolithiasis. B. Apply cold compress to the client's flank area: Cold therapy is not typically effective for renal colic pain, which is best managed with analgesics, hydration, and sometimes heat. Cold compresses may provide minimal relief but do not address the underlying problem. C. Restrict protein intake to 2 servings per day: Protein restriction may be advised for certain metabolic disorders, but it is not a standard intervention for all patients with urolithiasis. Nutritional adjustments depend on the type of stone, and general protein restriction is not universally recommended. D. Discourage ambulation: Ambulation is encouraged because movement can help facilitate the passage of kidney stones. Discouraging activity would prolong discomfort and delay recovery, making this an inappropriate action in the care plan.