I woke up not feeling well I think I had the flu.  It was even painful to walk.  I went to ER because felt terrible.  Later on during the week I notice the lower part of my back is swollen.  It still feel a little uncomfortable when I  walk but I feel better.  Im still concern because the lower part of my back is still swollen should I return to ER.
I have gone through your question and appreciate your concern. Lower back pain is common problem Which may be due to bad posture. U may visit specialist get examined To know the exact problem. U should change your lifestyle Anand exercises for your back. Muscle Strengthening exercises will Help in long term control of pain. Avoid bending forward and lifting heavy Weights. Lie on flat hard bed. Hot fomentation 3 times a day. Local Analgesic gel for local application. Muscle relaxants and analgesics will help. Thanks. U can write me back for any query.