Hydrocephalus isn't only a condition of babies and children — it affects adults too, either as a continuation of childhood hydrocephalus, as a newly acquired problem, or as normal pressure hydrocephalus (NPH) in older adults. Recognizing the signs in adults is important, because they can be mistaken for other conditions.
Two broad pictures in adults Adult hydrocephalus tends to present in one of two ways:
- Raised-pressure hydrocephalus — from an obstruction, bleed, tumor, infection, or other acquired cause, producing symptoms of increased pressure inside the skull.
- Normal pressure hydrocephalus (NPH) — an older-adult form with a distinctive triad of symptoms and often normal pressure (covered in its own articles).
Symptoms of raised-pressure hydrocephalus in adults. These can include:
- Headaches, often worse in the morning or when lying down.
- Nausea and vomiting.
- Vision problems — blurred or double vision.
- Balance and coordination difficulties, unsteadiness, or trouble walking.
- Cognitive difficulties — problems with memory, concentration, or thinking clearly.
- Drowsiness or lethargy.
- Changes in personality or behavior.
The combination and severity depend on the cause and how quickly the hydrocephalus develops. A sudden blockage or bleed can cause rapid, severe symptoms (a medical emergency), while a slowly developing problem may cause gradual, subtle changes.
Symptoms of NPH (older adults) NPH classically causes the triad of:
- Walking difficulty (a slow, shuffling, broad-based, or "magnetic" gait).
- Cognitive changes (slowed thinking, forgetfulness).
- Bladder symptoms (urgency, then incontinence).
These are detailed in the dedicated NPH articles, but they're worth knowing here because NPH is common, treatable, and frequently missed.
Why adult hydrocephalus is sometimes missed Adult symptoms — headaches, balance problems, cognitive changes — overlap with many other conditions, from migraines to other neurological disorders to, in older adults, "normal aging" or other dementias. This overlap means hydrocephalus isn't always the first thing considered. Persistent, unexplained, or progressive symptoms deserve thorough evaluation.
How adults are diagnosed Diagnosis involves a neurological examination and brain imaging — CT or MRI — to look for enlarged ventricles and any underlying cause. For suspected NPH, additional tests (a tap test or spinal drainage) help predict whether treatment will help.
What to do If you're an adult with persistent or worsening headaches, vision changes, balance problems, or cognitive difficulties — or if an older loved one is developing the NPH triad — see a doctor for evaluation. For sudden, severe symptoms (a thunderclap headache, rapid drowsiness, or collapse), seek emergency care.
The encouraging part Whether it's acquired hydrocephalus or NPH, adult hydrocephalus is treatable, and recognizing it is the crucial first step. In NPH especially, identifying the condition can open the door to meaningful improvement that might otherwise be missed.