Cerebrospinal fluid fills the subarachnoid space and plays a protective and nutritive role for the brain and spinal cord tissue. After some congenital or acquired abnormalities or surgery or trauma, it can communicate with the outside of the body via the rupture site as well as some natural anatomical channels in the body, forming a cerebrospinal fluid leak. The greatest danger of cerebrospinal fluid leaks is that they can form intracranial infections, which can be life-threatening in severe cases. The most common clinical types are nasal and ear leaks, although in some rare cases leakage from fistulae can be seen. Treatment includes conservative and surgical treatment: 1. Conservative treatment is mostly bed rest in a special position, combined with medication. Surgery is divided into two parts: one step is the localization of the fistula site, and the second step is the surgical repair method, which includes transnasal repair and open repair.