Eating breakfast half an hour defecation with food may be related to physiological reasons such as improper diet, may also be related to indigestion, irritable bowel syndrome and other pathological reasons. 1. Physiological reasons: if there is a long stay up late, overeating or eating spicy stimulation, greasy food, etc., due to increase the burden on the gastrointestinal tract, there may be half an hour after breakfast defecation with food. 2. Pathological reasons: If you suffer from indigestion, gastrointestinal dysfunction, irritable bowel syndrome and other diseases, due to the gastrointestinal tract digestion and absorption function is weakened, may lead to food can not be completely digested in the gastrointestinal tract, appear half an hour after breakfast defecation with food. There are more causes of defecation with food half an hour after breakfast, so it is recommended to consult a doctor in time to clarify the cause of the disease so as not to delay the condition.