There is certain odor producing bacteria present in your mouth that leads to foul breath.
In addition to this, some food products such as onion and garlic also lead to foul-smelling breath.
If you are not in the habit of cleaning or rather brushing your teeth adequately after having your meals, then chances of bacteria getting accumulated between your teeth is quite likely.
This isn't all; it also releases Sulphur compounds which lead to foul breath.
However, there are some bad breath home remedies that help you keep your breath fresh.
These are as follows:

• While brushing your teeth, prefer using dental floss between your teeth.
  Rinses and mouthwashes are also good choices.
  
• Ensure cleaning your tongue as well as a coated lounge may at times lead to foul-smelling breath.
  
• Rinse your mouth properly after having your meals.
  It is because bad breath originates from the mouth.
  If you don't rinse your mouth properly, then food particles get trapped in your teeth gets decayed in the long run, thereby leading to foul breath.
  
• Try chewing one to two cardamom seeds for sweetening your breath
• Take a lemon, extract its juices and mix it with one glass of water.
  Now rinse your mouth using this.
  
• Parsley leaves are leaves contain rich source of chlorophyll and are termed as nature's deodorizer.
  Hence, you can chew parsley leaves on a routine basis for keeping your breath fresh.
  
• Before you brush your teeth try using hydrogen peroxide for rinsing your mouth
• Make sure to eat apples on a routine basis as they help in removing the foul-smelling breath causing bacteria
• Phosphorous, calcium, vitamin D and A help in keeping your mouth healthy and Vitamin C protects your gums from bleeding.
  Hence, make sure to include sufficient amounts of citrus fruits, fresh vegetables, milk products like cottage cheese and yogurt and unrefined cereals into your routine diet regime.
  
• Eat sprouts and salads in sufficient amounts as they not only help in cleansing your teeth but also help in exercising the teeth and gums.
  
• Drink pineapple juice as it helps in curing bad breath
• Squeeze one lemon in one glass of water and gargle after frequent intervals.
  
• After every meal, chew one clove
• Drink tea prepared from fenugreek seeds
• After having your meals try chewing a few sunflower seeds followed by drinking one glass of water
• Prepare a cup of unsweetened tea and drink it hot.
  
• Add baking soda to warm and gargle using it.
  You also use it for cleaning your tongue
• Chew mint leaves as it helps in keeping your breath fresh
• Dip your brush in baking soda and use this as your toothpaste when it comes to brushing your teeth.
  Make sure to follow this habit after you wake up and before you go to bed.
  

Keeping your mouth healthy and fresh will take into account immense effort, particularly if you already suffer from bad breath problems.
However, you can cure your bad breath problems to a considerable extend by opting for the bad breath home remedies listed above.