causes bad breath mouth

What is the cause of bad breath of mouth i need advice and real tratment?
I went to the dentist doc said everything so well that he came from his
Bad breath comes from within, not necessarily the mouth.Be careful when eating spicy foods or garlic. There are many myths about caring for bad breath. Here are three things you may have heard about bad breath that are not true: Myth # 1 – Mouthwash will make bad breath disappears. Mouthwash eliminates only temporary bad breath. If you use of a mouthwash, look for an antiseptic (kills germs that cause bad breath) and the reduction of a plate with the seal of the American Dental Association (ADA). When you're deciding which dental products to launch in your shopping cart, always a good idea to find those who are accepted by the ADA. Also, ask your dentist what he or she recommends. Myth # 2 – While you brush your teeth, you should not have bad breath. The truth is that most people only brush their teeth for 30 to 45 seconds, which just does not cut it. To sufficiently clean all surfaces of your teeth should be brushed at least 2 minutes at least two times a day. Remember that by brushing the tongue – bacteria love to hang out there. It is equally important to floss because brushing alone will not eliminate harmful plaque and food particles that get stuck between teeth and gums. Myth # 3 – If you breathe in your hand, you'll know when you have bad breath. Wrong! When you breathe, you do not use your throat the same way that when you speak. When you speak, you tend to get the smells of the back of the mouth (where it originates bad breath), which simply breathing does. Also, because we tend to get used to our smell, it's hard for anyone to know if he or she has bad breath. If you're worried about bad breath, Make sure you are taking care of your teeth and mouth properly. Some sugar free gums and mints can temporarily mask odors, too. If you brush and floss properly and visit your dentist for regular cleanings, but your bad breath persists, you may have a medical problem like sinusitis or gum disease. Call your doctor or dentist if you suspect a problem. They can determine if something else is behind his bad breath and helps care for him.
