Doctors often advise extra fluids during respiratory infections like colds, flu, or bronchitis to replace losses from fever and to help thin mucus.
Intense exercise causes fluid loss through sweat; drinking before, during, and after activity is essential for recovery.
Your body requires more hydration when it loses water faster than usual or when it needs support processing waste. Common scenarios include:
Not all "extra fluids" have to be plain water. You can reach hydration goals through various sources: Diarrhoea Treatment Guidelines
Fluid needs increase to approximately 2.3 liters (10 cups) daily during pregnancy and 3.1 liters (13 cups) while breastfeeding to support the body's increased demands. Managing Fluid Intake