Pain below the navel and diarrhea are often related to improper diet, abdominal cold, gastrointestinal diseases and gynecological diseases. Patients are advised to pay attention to daily warmth, eat reasonably and seek active medical treatment if they have gastrointestinal or gynecological diseases. Common causes and related suggestions are as follows: 1. Improper diet: eating cold, greasy, spicy and stimulating and indigestible food can easily cause pain below the navel, and symptoms of diarrhea. It is recommended to develop regular eating habits, not overeating, light, easily digestible food, avoid spicy, cold food, to reduce the burden on the stomach and intestines; 2, abdominal cold: cold air and other external factors can lead to abdominal cold, triggering intestinal spasm, manifested as pain below the navel and diarrhea. It is recommended to warm the abdomen to relieve, such as hot water bags for warm compresses. You can also massage the abdomen with your hands to promote gastrointestinal peristalsis, speed up the remaining stool discharge and relieve symptoms; 3, gastrointestinal diseases: such as enteritis, patients can appear abdominal pain, diarrhea and other symptoms, the number of stools increases, and is thin paste or thin water. At this time, timely hydration is needed to avoid dehydration. In mild cases, semi-liquid food rich in nutrients can be consumed, while in severe cases, fasting is required. Commonly used drugs are noroxifloxacin, montelukast, etc.; 4, gynecological diseases: female patients who have abdominal pain, diarrhea symptoms, pay attention to the possibility of gynecological diseases, such as pelvic inflammatory disease. Inflammation of the pelvic cavity produces pressure on the rectum after congestion, stimulating contraction of the rectal mucosa and eventually triggering defecation. At the same time, this type of disease may be accompanied by symptoms such as increased leucorrhea and odor. If these symptoms are present, a gynecologist should be consulted to investigate the lesions. In daily life, it is recommended to maintain personal hygiene, change underwear regularly, and eat a light, easy-to-digest diet. In addition, sexual intercourse should be avoided during the treatment period.