What are the symptoms of hydrocephalus?

Hydrocephalus is a condition in which there is extra cerebrospinal fluid around the brain and spinal cord. Cerebrospinal fluid acts as a cushion for the brain and spinal cord, supplies nutrients, and takes away waste products. Symptoms vary depending on the age when hydrocephalus develops and how quickly it progresses. Common symptoms include headache, vomiting, lethargy, and difficulty concentrating.