The causes of vague pain on the left side of the navel mainly include the following aspects: 1, due to the body’s digestive system dysfunction, especially intestinal peristaltic function abnormalities caused. Mostly due to the usual indigestion, eating more spicy and stimulating or greasy food, which increases the burden on the digestive system, causing intestinal peristalsis increased resulting in intestinal colic; 2, due to the usual diet inattention, overeating, etc. resulting in slow intestinal peristalsis, intestinal contents out of the body obstruction caused by intestinal obstruction, resulting in the left side of the navel vague pain; 3, due to abdominal muscle strains or strain, etc., mostly due to the usual Physical exercise or heavy work causes strain on the abdominal muscles; 4. Urinary system diseases, including inflammation and stones, cause vague pain on the left side of the navel. If the pain level increases, it is necessary to go to the hospital for ultrasound and routine blood and urine tests to clarify the diagnosis.