Pain under the navel can be caused by many diseases, the common ones are: First, female patients appear before, during and after menstruation, pay attention to rest and warmth, avoid getting cold, strengthen care after the symptoms can gradually improve, the pain can be treated with symptomatic pain relief if the pain is severe. The actual treatment needs to be combined with the actual situation of the patient. This is a good way to get a clear diagnosis. The cause of trauma is clear, and further ultrasound of the abdomen should be performed to exclude any organ damage, if there is no organ damage, the pain can be gradually relieved after paying attention to rest. V. Kidney stone, ulcerative colitis, abdominal tumor, etc. can be caused, which should be combined with the actual situation of the patient. Therefore, when lower abdominal pain occurs, it should be taken seriously and the cause should be further clarified.