Hi. I m sure I ll just be told to go visit a doctor, but in the meantime, what could cause severe pain in the abdomen with no other side effects? The area is sensitive to pressure and it s painful to do certain things that use abdominal muscles (such as lifting a leg to put a sock on while standing). It is mostly the area around the belly button, kind of between upper and lower abdomen sections. Nothing happened that I am aware of to cause this distress. Could it be related to food, or stress? A low pain is pretty constant, but there will be waves of more acute pain that seem to shoot upwards. It s painful to stand and sit and lay on my back. The only comfort I get is laying on my side. Thanks.