The phenomenon of pressing pain on the left side of the navel may be caused by muscle injury, or peritonitis, enteritis and other causes. 1. Muscle injury: muscle injury caused by excessive exercise can appear on the left side of the navel pressing pain phenomenon. 2. Peritonitis: refers to the localized peritoneal inflammatory reaction in the abdominal cavity and peritoneum due to bacterial infection, chemical irritation or physical injury, which can cause pain on the left side of the navel when pressed. 3. Enteritis: due to microbial infection, ischemia and immune imbalance, caused by the intestinal inflammatory response, typical symptoms of abdominal pain, diarrhea and fever, can also appear on the left side of the navel pressure pain phenomenon. In addition to the above, there are other conditions that may lead to the left side of the navel pressure pain, it is recommended to go to the hospital for examination, follow the doctor’s instructions in a timely manner for targeted treatment, so as not to delay the condition.