Researchers say there's a point where a person takes too many selfies.
It's called Selfitis.
Researchers at Nottingham-Trent University in the United Kingdom have set some guidelines to tell when someone is suffering from the disorder.
There are three levels of Selfitis; the worst is chronic Selfitis.
That's when a person takes selfies all day and posts at least six of them on social media.
Selfitis has been classified as a mental disorder by the American Psychiatric Association.
Experts say some people excessively post photos of themselves because they have anxiety about their appearances.
