Hydrocephalus is a build-up of the clear fluid that normally cushions the brain. When the drainage system gets blocked, the fluid collects and gently stretches the brain’s chambers. The clues differ by age, but they all point to one fact: the head is under quiet pressure. Babies Head grows faster than the rest of the body Soft spot feels tight or bulging Eyes turn downward so the whites show like a setting sun Poor feeding, easy vomiting, high-pitched cry Toddlers and older kids Morning headache that fades when they sit up Nausea or vomiting with the headache Eyes cross or... Learn more