Back injuries such as pulled muscles, ligament injury and nerve injuries can lead to life-long chronic pain if not treated properly.
The best thing to be doing is putting cold compresses on it to reduce the inflammation and swelling. This will also help relieve related pain.
In order to heal any kind of soft tissue damage what you need is blood flow. There is a Blood Flow Stimulation Therapy (BFST) that I highly recommend. It is an energy web within a back wrap that promotes the circulation you need, deep down below the dermal level, in order to heal.