What are the symptoms of a bad spleen? I m asking because approximately 7 years ago I had really bad pain on my left side and a fever also. I went to ER and they ran all kinds of tests but said I must be allergic to something, like a 24 hour thing or something I ate. Pain and fever gone next day. But for the past 7 years I still get intermittent pain on left side (no fever.) However the pain is worse, my energy level has sunk to a new low and I keep getting reacuring headaches. Also I m hot and cold all the time and have constant sore throat. So that s my question with a few symptoms thrown in. I appreciate any answer you can give..