Infant hydrocephalus initially manifests as an enlarged head, beginning from birth with progressive increase in head circumference that is disproportionate to body growth. Upon examination, bulging fontanelles, thin scalp, and clearly visible scalp veins can be observed, with widened or even separated sutures. Additionally, due to increased intracranial pressure, symptoms such as irritability, recurrent vomiting, refusal to eat, abnormal behavior, and seizures may present as early indicators.