@Atperth, Sorry about your experience.

Causes of chronic halitosis due to metabolic dysfunctions.

OroDental Causes: This is are the most common causes of halitosis with the anaerobic bacteria living in the mouth accounting for the majority of bad breath cases.

Smoking

Certain foods with a strong odor including garlic, onion and seafood.

Poorly fitted dentures

Halitosis Can Reduced or Prevent

Practice good oral hygiene. Brush twice a day with fluoride toothpaste to remove food debris and plaque

See your dentist regularly-- at least twice a year

Stop smoking and shewing tobacco based products

Drink lots of water

Keep a log of the food you eat