Some types of food such as onion, garlic and some other spices with scented odors cause bad breath.
Poor dental hygiene
Lack of interest in cleaning the teeth on a daily basis and removing food residue from the teeth, causing bad breath; bacteria accumulate on the remaining food particles inside the teeth.
Tobacco and tobacco products
Smoking from the causes of bad breath, as tobacco and tobacco products and other major causes of gum disease, which may reach the cancer.
Saliva helps to cleanse the mouth and remove odors that cause unpleasant odors. Dry mouth causes bad mouth odor; it occurs naturally during sleep and increases significantly in people who sleep and their mouths are open.
Bad breath is one of the problems always associated with sinusitis because mucus fills the mucous membranes, which quickly produce a foul odor when crammed into the respiratory tract.
Oral and gum infections
Oral and gum infections always cause bad breath due to bacteria, so it is recommended to rinse with water and salt after each meal if you have a sore mouth, gum disease, or oral surgery.
Some medications, such as high blood pressure, depression, allergies, and stomach ulcers, cause dry mouth, resulting in bad breath.
Sugar and some other diseases
Diabetics suffer from bad breath, and there are other cases of unpleasant odors, such as pneumonia, tonsillitis, and gastroesophageal reflux.