Just eaten the instant noodles out of the consideration with the irritable bowel syndrome, dyspepsia, acute gastroenteritis and other causes related. 1. Irritable bowel syndrome: spicy stimulating noodles can stimulate the gastrointestinal mucosa, causing abnormal gastrointestinal movement, such as gastrointestinal peristalsis enhancement, slowdown or spasm, can cause diarrhea, abdominal pain and changes in stool characteristics, thus appearing the above symptoms. 2. Indigestion: instant noodles belong to fried food, itself rich in fat, oil can increase the burden on the gastrointestinal tract, causing abdominal pain, nausea, vomiting, loss of appetite and other symptoms, resulting in eating instant noodles after the bowel movement. 3. Acute gastroenteritis: eating instant noodles without paying attention to dietary hygiene or consuming contaminated or expired instant noodles can cause acute inflammation of the gastrointestinal mucosa due to viral, bacterial, fungal and other infections, resulting in diarrhea, abdominal pain, nausea, vomiting and other symptoms. The above situation may also be related to the patient’s own peptic ulcer, Crohn’s disease and other diseases, the stimulation of instant noodles induced or aggravated by diarrhea and other symptoms. It is recommended that patients seek timely medical attention to clarify the cause of the disease under the guidance of a professional doctor and carry out targeted treatment.