Hi.. Welcome to Healthcare Magic. I have gone through your query and can understand your health concerns.. As per your complain sulphur like or rotten egg like taste in mouth can occur due to a few causes like Acid reflux in gastric oesophageal disease, diabetes, dry mouth due to which there is over growth of sulphur producing bacteria, dyspepsia, indigestion, gum and tooth infections etc.. At times sulphur containing food preservatives can also cause similar problem. You need to consult a physician and get an evaluation done.. In case if you have acid reflux problem taking Nexium twice daily, antacids like Digene and avoiding acidic foods can help.. In case of dental problems treatment of the same by a dentist and maintaining a good oral hygiene can help.. Take more of fresh fruits and green leafy vegetables and avoid packed food to avoid preservatives.. Avoid or reduce strong odour foods like garlic and onion. Get checked for blood sugar levels and maintain normal levels by dietary modifications, cutting on sugars and carbohydrates and doing considerable workouts.. Hope this information helps.. If you find the answer helpful please give me a Five Star Review and click on found the answer helpful as a token of appreciation.. Thanks and regards.. Dr.Honey Nandwani Arora..