After falling and breaking my patella January of last year I have developed a lump on the inner side of my knee. It lies right around my varicose vein. My doctor has recently prescribed me Tramadol 37.5 mg with Ibuprofein 325 mg twice a day but so far this has not helped. I am wondering if it's safe to take 2 doses at a time. Also, any suggestions as to what this lump might be? I have no official diagnosis yet.