When most people think about addictions, they think about alcohol, tobacco or other drugs. Some addictions, though, are common behaviors that people just can't control. Did you know you could have an addiction and not even realize it? See more »

While some celebrity meltdowns are the result of ego or eccentricity, others are the result of something deeper. Here, we've pulled together a list of famous meltdowns that may have had roots in mental illness or drug and alcohol addiction. See more »

Most of us have days when we don't feel like ourselves. However, some people with dissociative identity disorder feel disconnected from their surroundings, actions and themselves all the time. Learn the myths from facts here. See more »

Lots of people love to shop -- it's fun to get shiny new things. But when does your shopping habit qualify as a problem? See more »

Sometimes an unruly, out-of-control kid isn't just misbehaving. ADHD affects quite a few people, but it's a condition that manages to attract a lot of controversy. Is ADHD a case of too much sugar, bad parenting or something more complex? See more »

One month you're so revved about life you give up sleep to enjoy it. The next, you're so depressed you can't get out of bed. Can bipolar disorder be treated? See more »

The first credit card came onto the shopping scene in the late 1950s, and Americans have been living on borrowed money ever since. Do you know what shopping habits might indicate you have a shopping addiction? See more »

Maybe you don't like anyone sitting right next to you on the train, but you wouldn't call yourself a claustrophobe. According to some theories, we might all have a touch of claustrophobia -- even if it takes undergoing an MRI scan to provoke it. See more »

Most shoplifters steal for personal use or resale, but kleptomaniacs are addicted to stealing. But is kleptomania a real mental disorder? See more »

Being sick is something most people try to avoid. But some relish the thought of going to the doctor, undergoing tests -- even having painful surgery. Though they know they aren't really sick, people with Munchausen syndrome pretend to be ill because they're seeking attention and sympathy. See more »