hello,
Dry mouth causes
bad breath. When you have dry mouth, especially in the morning, dead cells accumulate in the mouth and decompose causing foul odor.
Local factors like improper
oral hygiene (poor brushing habits, irregular eating habits causing repeated food lodgment on the tooth surfaces.
Some other causes of bad breath include:
gerd(reflux disease),diabetes
Tobacco chewing
Smoking
Alcohol
Gum (periodontal) disease
Anemia
tretment includes-
1-Avoid eating foods with refined carbohydrates and sugars like cookies, sweets, cakes, carbonated soft drinks, ice creams
2-Drink sufficient amount of water (6-8 glasses) daily
3-Brush teeth daily especially before going to bed
4-Gargle with salt water to reduce bacteria in the mouth.
5-you can use a mouthwash also
if after all these no improvement consult a dentist