Unlike a simple hobby or a passionate interest, a hyperfixation is all-consuming. It is characterized by an intense, obsessive focus on a specific topic, activity, or piece of media. This can last for days, weeks, or even months, only to disappear as suddenly as it arrived.
Relationships can suffer. A person deep in a hyperfixation may ignore calls from friends or family, appearing distant or uncaring. To the outside observer, it might look like obsession or compulsion.