The right amount of cerebrospinal fluid plays a vital role in the normal functioning of the brain tissues, supplying certain nutrients to the brain cells, transporting metabolic products of the brain tissues, and regulating the acid-base balance of the central nervous system. In addition, it buffers the pressure on the brain and spinal cord, and has a protective and supportive effect on the brain and spinal cord. However, cerebrospinal fluid can be either too little or too much. If the amount of cerebrospinal fluid is too small and there are no obvious clinical symptoms, there is no need to worry too much and daily observation is sufficient. If too much fluid collects in the ventricles of the brain and cannot be discharged in a timely manner, the amount of cerebrospinal fluid will increase over time, thus compressing the head and causing a variety of uncomfortable symptoms. What are the symptoms of fluid pressure on the head? There are many symptoms caused by fluid pressure on the head, and patients need to be careful. At first, clinical symptoms such as dizziness, headache, nausea and vomiting may occur; as the degree of compression increases, it may cause numbness and weakness of one side of the limbs. In addition, it may also cause speech dysfunction, seizures and other serious symptoms. At this time, if you actively take effective countermeasures, the symptoms can be effectively improved to reduce the harm. In later stages, if the compression is severe, it may cause cognitive function decline, unsteady walking and incontinence, and may even be life-threatening. Therefore, when the amount of cerebrospinal fluid is large, we must be vigilant and go to the hospital in time to do the relevant examination. If the diagnosis is hydrocephalus, the urgent need for surgical treatment is the first priority.