The stool appears watery, consider two aspects. First, enteritis, which is generally caused by bacteria, viruses, fungi, and parasites, is gastroenteritis, small intestine inflammation and colitis. Clinical manifestations include nausea, vomiting, abdominal pain, diarrhea, mucus thick blood stools, and some patients can have fever as well as a feeling of urgency to be called infectious diarrhea. Enteritis can be divided into acute and chronic according to the duration of the disease. In general, the duration of chronic enteritis is more than two months. The other kind of diarrhea is considered to be caused by functional indigestion due to cold, or eating too fast, poor digestion, eating too greasy food. It can be temporarily relieved by montelukast with Pefixan. If the diarrhea persistently does not resolve and the symptoms continue to worsen, it is necessary to consult a doctor for further examination. Please follow the doctor’s instructions for specific medication and treatment.