Frequent and smelly farting may be caused by physiological reasons such as eating foods containing more protein or pathological reasons such as gastrointestinal dysfunction and intestinal tumors. 1. Physiological reasons: protein is made up of amino acids, and its fermentation in the intestinal tract will produce very smelly gas, so if you eat more protein-containing foods, frequent farting and very smelly situations will occur. 2. Pathologic causes: (1) Intestinal and gastrointestinal dysfunction: affected by living habits and mental factors, intestinal and gastrointestinal motility is disturbed, which leads to the inability of food to be digested completely, and the fermentation and gas production in the intestines and stomach, resulting in frequent farting phenomena. In addition, there are proteins and fats in the daily diet, and when these substances are not fully digested, foul-smelling gas will be produced. (2) Intestinal tumor: It affects the digestion, absorption and elimination of food in the intestines, causing food to remain in the body for too long. In the intestinal tract, it starts to ferment and produce a lot of foul-smelling gas, so frequent farting with bad smell will occur. Frequent farting and very smelly symptoms alone can not accurately determine the cause, but also need to be combined with the characteristics of the medical history, other test results in order to make an accurate judgment, frequent farting and very smelly may also be caused by other reasons, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor to carry out targeted treatment. Please do not take medication on your own to avoid delaying your condition.