5th metatarsal pain

I’ve had a very similar problem to sarah (7/30/04)-injury to 5th metatarsal- and i’m currently celebrating my 1 year anniversary of foot pain! Once again nothing on MRI or bone scan and the pain and swelling is mainly at the base.
If it was a sural nerve entrapment or problem with the peroneus brevis tendon do you have any suggestions for what I could do to improve the pain and swelling?
Any advice would be greatly appreciated.