Brain fluid leaking into ear canal is a possible complication of obesity. According to the study, such situation is more common among those who are middle age and overweight. Besides, brain surgery or big trauma, like an accident can also lead to the situation.
Brain and spinal cord are surrounded by cerebrospinal fluid, which looks like water. The fluid is critical for brain function, delivering nutrients and acting as a cushion and shock absorber. The body keeps making this liquid and recycling it about twice a day in a system that’s tightly enclosed.
Brain leaking can happen after brain surgery or big trauma, like an accident. But spontaneous cerebrospinal fluid leaks are not caused by any surgery or accidents, they are causes by other diseases that make skulls thinner.