It’s known as "navel pulling," and involves massaging castor oil on your belly button and abdominal area. To do what exactly?

An curved arrow pointing right. The belly button challenge has taken Weibo – China's Twitter – by storm. Over 130 million people have tried to reach around their back to touch their belly ...

"They had to make sure that Ginger wasn’t showing too much cleavage and that I wasn’t showing too much belly button ... at the time — and they were looking at my torso!" ...

But no one knew the answer. So for three years he collected his own belly-button lint to find out. And after interviewing friends and analyzing 503 of his own samples, Steinhauser discovered the ...

The latest one involves putting castor oil in your belly button, also known as naval pulling ... Or, if you’re looking for a solution to your bloating, consider tried and true methods.