The smell of exhaust gas is relatively heavy may be considered to be related to poor digestion, which is commonly referred to as indigestion, or malabsorption, as well as gastrointestinal dysfunction, irritable bowel syndrome, or H. pylori, are all related. The occurrence of a similar situation is recommended. First, reduce the intake of substances that are easy to produce gas, or easy to have a fermented odor, such as reducing the intake of soy products, such as tofu, soy milk, etc., can cause increased gas production, or cause the smell of exhaust gas is relatively thick and heavy. Second, it is recommended to check for Helicobacter pylori, because this type of bacteria can cause some symptoms of indigestion, there may also be a similar reaction in the process of exhaust. Third, we should pay attention to abdominal warmth, and reduce cold diet, in addition to onions, ginger, garlic and other overly stimulating food also try to reduce the use, especially such as onions, may also cause a similar situation, usually pay more attention to the diet and lifestyle habits of adjustment, the situation can be properly alleviated.