Oil pulling or oil swishing is a traditional Ayurvedic remedy that involves swishing oil in the mouth. It is mentioned in the Ayurvedic text Charaka Samhita, where it is called Kavala Gandoosha or Kavala Graha.
I found this article online to be helpful and informative: http://www.alternative-health-group.org/oil-swishing.html
My experience: I would recommend you do not use olive oil as it has too strong a taste. You will eventually build up to 15 - 20 minutes of swish practice. I have had the best results with cold pressed pure organic unrefined sesame oil. Coconut oil also comes highly recommended, though you may need to warm it to a liquid consistency, first.
Swishing is practiced only upon arising. If you are experiencing any gum problems, especially bleeding gums, you might want to consult a dentist or doctor before attempting to swish oil.
The unexpected benefit of swishing oil is whiter teeth, pink, healthy gums, fresh breath, and improved muscle tone in the lips, cheeks and face. It is great for strengthening sensitive teeth. As well, oil swishing literally pulls toxins from the tongue, between teeth, mouth, throat and body system.
Oil Pulling has been around for a long time. However, as a new practice, it may take a bit of getting used to. Be patient with yourself. My first attempt lasted only a few minutes!
Some people may also experience an unpleasant gag reflex. If you begin by keeping the oil contained towards the front of your mouth, this won't likely happen. With practice, the health benefits will far outweigh the inconvenience.
I have a friend who swishes when she walks the dog in the morning. She has noticed that swishing reduces her appetite and craving for sweets.
I have had great results with oil swishing and I hope you will try experimenting with it. Happy swishing and good for you for giving it a try!