Brain researchers have found that listening to people nag and complain can actually affect the way your brain works, and that it has some pretty negative consequences for you. They explain that the brain works much more like a muscle than originally thought. They say that if you listen to someone being negative for a long time, you're more likely to behave that way.
What's worse, it can even make you dumb. Researchers found that being exposed to more than 30 minutes of negativity takes away neurons in the brain's hippocampus, the part of the brain that you use to solve problems!
If you want some tips on how to avoid this, check the source