In children with sickle cell anemia, which condition most commonly exacerbates disease?

• A. Hydration and rest
• B. Viral and bacterial infections
• C. Adequate sleep
• D. Regular physical training

Answer: (B)

In sickle cell disease, crises are often sparked by conditions that promote red blood cell sickling, and infections are the most common trigger in children. When a viral or bacterial infection occurs, fever raises metabolic needs and often leads to dehydration from poor intake and fluid loss. The illness can cause inflammation, acidosis, and lower oxygen levels in the blood. These factors push hemoglobin S to polymerize and sickle, making red cells rigid and sticky, which blocks small vessels and triggers vaso-occlusive pain crises and other complications.

Hydration and rest help prevent crises by reducing sickling risk, adequate sleep supports overall health, and regular physical activity can improve health but can also provoke crises if extreme; however, infections remain the single most frequent precipitating factor.