The problem of hydrocephalus is not uncommon, but many people do not understand what kind of situation it is. In fact, the occurrence of hydrocephalus is inseparable from the cerebrospinal fluid. In normal people, there is cerebrospinal fluid in the cranial cavity, which plays a very important role in the health of the body and is measured to exist. When affected by some other factors, there are problems with the production, circulation and absorption of cerebrospinal fluid, and the increasing amount of cerebrospinal fluid leads to the appearance of ventricular dilatation and the formation of hydrocephalus. Hydrocephalus can occur in young children, adults and the elderly. The main symptoms of hydrocephalus in young children are a larger-than-normal head, speech and movement disorders, and the risk of mental retardation; in adults, hydrocephalus is generally characterized by dizziness and headache, limb movement disorders, and vision loss; in the elderly, dementia is the main symptom, and is accompanied by unstable walking and urinary frequency and incontinence. In the elderly, the symptoms are mainly dementia. Whether it is hydrocephalus in young children, adults or the elderly, the risk is great, and once the problem occurs, we must actively face it and take effective treatment measures. Currently, there are two types of treatment for hydrocephalus: medication and surgery, but medication is generally used as an adjunct to surgery for most hydrocephalus. Does hydrocephalus surgery require craniotomy? Many patients are concerned, but in general, hydrocephalus surgery does not require craniotomy, such as conventional hydrocephalus shunt surgery, which only involves drilling a hole in the skull.