Hi
I have noted your concern. You have mentioned medical condition in your history. Based on the following information people having that medical condition will have gastritis / altered digestion problems and you might also be taking some sort of medication
If yes, they will also alter the oral & gastric mucosa causing bad Breath
Next Steps
kindly consult the general physician first for solving your medical condition
visit dentist online / offline for further evaluation
Health Tips
Don't take spicy foods, take foods rich in Fibre, drink plenty of water