Lower abdomen pain is any discomfort or unpleasant sensation occurring in the abdomen below the belly button. Find out the causes, symptoms and treatments available. What is Lower Abdominal Pain? Lower abdominal pain in a young woman due to irritable bowel syndrome — IBS. Do you have pain here? Where exactly is your pain? The most important task now is to try and work out what is causing the pain and more importantly to exclude serious conditions of abdominal pain that require immediate medical attention. To do so, let’s take a look at the organs that are found in the lower abdomen and identify what can go wrong with these organs, the most common causes of abdominal pain in this region and how to identify them, as well as a list of other causes of pain in the lower abdomen. The lower abdomen is where the small and large intestines are located including the appendix, cecum, sigmoid colon and rectum. Below these but intimately connected to the lower abdomen are the scrotum, testicles and epididymis in men. Any infection, inflammation or injury affecting any of these organs will result in pain and discomfort, often felt in the lower abdomen. To aid our understanding of how to work out things that might be wrong in the lower abdomen, let’s now re-arrange the organs in the abdomen, roughly as they would be naturally found in the abdomen.