Aplastic anemia occurs when the bone marrow stops producing enough new blood cells—including platelets. Depending on the individual, the condition may occur suddenly or gradually. The most common causes include chemotherapy, exposure to toxic chemicals, autoimmune disorders, and viral infections. Frequently, the condition can lead to shortness of breath, pale skin, irregular heart rate, easy bruising, prolonged bleeding, and dizziness. People with more severe issues may need medications, blood transfusions, or bone marrow transplants.

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