hi welcome to HCM.
Stress or nervous tension is a major enhancer of bad breath
.POOR oral hygiene
also causes bad breath.
foods or substances which often cause bad breath: garlic, raw onions, cabbage, horse radish, eggs,fish,red meat,cigarettes,alcohol and coffee.
.Medical risks for bad breath include bronchial and lung infections, chronic sinusitis
, post-nasal drip, tonsillitis
, untreated nasal polyps, diabetes, syphilis ,chronic liver diseases etc.
as u r having history of hepatitis you consult your physician to rule out that.maintain good oral hygiene,use artificial saliva if your mouth is dry,drink plenty of water,regular mouth wash.thanx bye