There are many ways to find out if your breath is offensive. Don't let people around you make the discovery, find out for yourself and then do something effective to take care of the problem.
This simple video demonstrates the "spoon test". Simply lick a spoon and then let it dry off and take a wiff! It is a very effective test to find out if you have halitosis.
More than likely you have some degree of bad breath. The best way to solve this problem is to remove the slimy bacterial bed that is resting on your tongue. Most people brush their teeth faithfully yet never tend to the real culprit - the tongue.
Bacterial laden slime builds up on the surface of the tongue and can only be dealt with by forcefully removing it with a cleaner.
There are basically two kinds of tongue cleaners. One involves tiny nylon bristles and then there are the stainless steel scrapers.
I have tried both types and I can say without reservation that the brush is the best. I personally use the Ora-Brush tongue cleaner and it has done wonders for my breath. The video demonstration of the Ora-Brush graphically demonstrates the extent of the slime build up on the tongue
Once this goo is removed the bacteria that produce the sulfur compounds that cause the odor can no longer grow and multiply.
The Ora-Brush is inexpensive and lasts a long time. However, just like a toothbrush it should be replace before obvious signs of wear occur.
If you have problem breath then I highly recommend the Ora-Brush tongue clearer.