Septic shock resuscitation often begins with fluid. That makes physiologic sense. Sepsis causes vasodilation, capillary leak, relative hypovolemia, and impaired venous return. Fluids may increase stressed venous volume, improve preload, and augment cardiac output.
But fluids are not neutral.
Once a patient is no longer fluid responsive, additional crystalloid may increase venous pressure without meaningfully increasing stroke volume. That can worsen pulmonary edema, renal congestion, gut edema, hepatic congestion, and tissue oxygen diffusion.
The modern question is not whether fluids are good or bad. The question is when they help and when they harm.
CLOVERS studied patients with sepsis-induced hypotension and compared an early restrictive fluid strategy prioritizing vasopressors with a liberal fluid strategy. The trial did not show a significant mortality difference before discharge home by day 90.