Hello, and thanks for your medical question on E Health Forum.
Stomach or intestinal gas is a byproduct generated during the process of digestion. It is generally expelled from the body, either through the mouth (called belching or burping) or through the rectum (flatulence or flatus). The flatus if smells bad, is due to fermentation process of the colon contents, which generates sulphur gases, which produces that foul odor.
The best way to prevent this condition is via dietary and lifestyle changes.
1. Eat slowly by chewing the foods properly. This reduces the amount of air ingested while eating & also facilitates carbohydrate digestion.
2. Pay attention to the kind of food you have been eating lately. This would help identify specific foods that cause bad stomach gas and then cut down its consumption.
3. In addition to the above methods, Activated charcoal, probiotics and digestive enzyme supplements can be used for intestinal or stomach gas relief. Activated charcoal tablets have the best effect in relieving your symptoms.
But, if the problem persists for a long time, you may consider to consult your physician for an examination and diagnostic tests for digestive and absorption disorders.
I hope this helps.