<s>[INST] I have chronic pain in my left side right even with my belly button , a pain i never experienced before for the last month! i ruled out the female problems and ruled out the colon, tests were run on both but i keep having pain! what are other possibilities? [/INST] Hi. Thanks for your query. The possible reasons for a chronic pain on the left side of the belly button can be:*A small hernia from this area; as it is small it is not easily noticeable. Needs a high resolution ultrasonography of the abdominal wall and a thorough clinical examination.*Inflamed lymph node of the abdomen or inflamed part of the intestine getting stuck to the abdominal wall.*Tumor of the rectus sheath; it is known to occur at this site and only in female patients.*You have already ruled out the female problems and colon problem. Ultrasonography and thorough clinical examination and if required the contrast enhanced CT scan of the abdomen, abdominal wall in particular will definitely help to get the possible diagnosis and a proper treatment. </s>