<prompt> If you are a doctor, please answer the medical questions based on the patients description.I just notice a big lump on the left side of my abdomen. I had not notice it before. It does not hurt when I touch or press on it. It just feels a little hard but thats about it. Any ideas? P.S. Ive been lifting weights lately but I dont recall hurting myself while doing it. Im 54 years old white male. Had a double bypass at age 43. High blood pressure and slightly high cholesterol managed with medication.  <response>: Hello Fairbanks for using Chat Doctor.come have evaluated your query thoroughly. There may be Extra abdominal - lipoma - sebaceous cyst - neurofibroma - others Intro abdominal - spleen enlargement - left kidney issue usually bulge over back - colon related - mesenteric cyst - others Ultrasound examination of the same is highly recommended for diagnosis Hope this clears your query. Welcome for any further assistance. Regards. 