Pressing the left side of the navel with pain, you need to consider muscle injury, small bowel disease, colon disease, kidney disease and so on. 1. Muscle injury: the left edge of the navel is the rectus abdominis muscle and other muscles, if trauma or strain will cause muscle pain. 2. Small bowel diseases: for example, inflammation of the small bowel caused by unclean diet, intestinal spasm, intestinal obstruction and so on may cause pain by pressing. 3. Colon diseases: common inflammation of the colon, tumors of the colon, can also appear painful symptoms. 4. Kidney diseases: for example, the left side of the kidney stones, glomerulonephritis, etc., may cause pain in the kidney area, especially when pressing the pain may not be obvious. Pain on the left side of the navel when pressed should be promptly consulted in the hospital for clear diagnosis and treatment.