Internet addiction is a fairly new problem, but it's growing fast, and it already effects 16% of people online right now.

Studies show that Internet addicts share a lot of the same traits  as smokers, and that genetics may play a role.

Internet addiction means that "All their thoughts revolve around the Internet during the day, and they feel their well-being is severely impacted if they have to go without it."

Researchers found that those people were also more likely to have a genetic difference that's associated with nicotine addiction.

That difference is linked to the brain's reward system, and it's actually more pronounced in women.

The study author said, "Internet addiction is not a figment of our imagination."