After a head injury, fluid can build up even when the skull looks intact. This “water on the brain” creeps in weeks or months later, so changes are often blamed on mood or fatigue alone. The first sign is usually walking trouble: feet feel stuck to the floor, steps shorten, and turns take tiny shuffles. People joke they’ve “forgotten how to walk.” Thinking slows next. You lose the thread of a short story, need grocery lists for three items, or answer questions seconds too late. Bladder urgency shows up. A normal day ends with sprinting to the bathroom, and nights... Learn more