The causes of frequent smelly farts are dietary factors, constipation, intestinal flora imbalance, digestive diseases and so on. 1. Diet: some people have a great relationship between frequent smelly farts and dietary factors, such as eating too much food containing fat, protein, gas-producing foods such as soybeans, radish, sweet potatoes, etc., more than the human body’s ability to digest and absorb these nutrients will produce more ammonia-containing gases in the intestinal tract, which will cause people to frequently let out smelly farts. 2. Constipation: Long-term constipation will lead to the accumulation of food in the intestines, which will produce a lot of amines, which in turn will lead to farting and stinking. 3. Intestinal flora imbalance: beneficial and harmful bacteria in the human intestinal tract maintain a dynamic balance; an increase in the number of beneficial bacteria will promote digestion, while an increase in the number of harmful bacteria, especially anaerobic bacteria, will inhibit digestion and produce excessive gas, which will result in the frequent release of smelly farts. 4. Digestive diseases: patients with gastritis, enteritis, dyspepsia and other diseases, long-term malabsorption of nutrients in the intestine, part of the nutrients can’t be absorbed normally, and the abnormal metabolism in the intestine will produce too much odor, which is discharged through gastrointestinal peristalsis and will lead to frequent release of smelly farts. Frequent smelly fart patients need to adjust the diet, and then exclude dietary factors after the symptoms do not relieve the patient, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor to clarify the cause of the disease so as to treat.