A nurse is speaking with a client who called the provider's office to report chest pain and requests clarification about how to take their sublingual nitroglycerin. Which of the following statements should the nurse make?

A. Mastitis: Mastitis is an infection of the breast tissue, often caused by bacteria entering through a cracked nipple. It presents with localized redness, warmth, tenderness, swelling, and systemic symptoms such as fever and chills. These signs align with the client’s sudden onset of chills and a tender, red area on the breast, indicating an acute infectious process.

B. Engorgement: Engorgement occurs when the breasts are overfilled with milk, leading to generalized swelling, firmness, and mild discomfort. It usually develops gradually rather than suddenly and is not associated with systemic symptoms like chills or fever.

C. Blocked milk duct: A blocked duct can cause localized firmness and tenderness, often forming a small, palpable lump. Unlike mastitis, it typically does not produce systemic symptoms such as chills or fever, and the redness is usually limited to the area over the blockage rather than indicating infection.

D. Thrush: Thrush is a fungal infection caused by Candida species, affecting the nipple or infant’s mouth. It presents with pain during breastfeeding, itching, or burning, and may show white patches on the nipple or tongue. Thrush does not cause localized redness, tenderness, or systemic symptoms such as chills.

A. Client report of headache: Headache is a nonspecific symptom and may occur with fluid shifts or mild febrile reactions, but it is not a primary sign of an allergic transfusion reaction. It does not reliably indicate hypersensitivity to the transfused blood.

B. Distended neck veins: Distended neck veins suggest fluid overload or heart failure rather than an allergic reaction. This finding is associated with increased central venous pressure and is unrelated to hypersensitivity responses.

C. Marked hypertension: Elevated blood pressure can result from anxiety, pain, or fluid overload, but it is not characteristic of an acute allergic reaction to a blood transfusion. Allergic reactions typically do not cause significant hypertension.

D. Onset of urticaria: The appearance of hives (urticaria) is a classic sign of an allergic reaction to a blood transfusion. It reflects a hypersensitivity response mediated by histamine release, often accompanied by itching and sometimes mild flushing, indicating that the immune system is reacting to proteins in the donor blood.