I had sinus problems for 3 years and finally went to an ENT (Ear nose and throat) doctor and an Allergist and got diagnosed with sinusitis. Sinusitis is present when you have green or yellow mucus, this will be the primary cause of your bad breath.  You will need to see a doctor to determine if you have sinusitis but as mentioned in few of ...

I, too got them after eating. I finally nailed down the cause. Mine are caused by ANY AMOUNT OF HYDROGENATED OIL. Partially or completely HYDROGENATED OIL, also known as TRANS FAT, or called TRANS FATTY ACIDS, or  labeled as MARGARINE and also VEGETABLE SHORTENING!     This country allows many misleading ingredient lists to be ...