Maybe worth investigating.
Available through your medical doctor. Cannabinoids interact with neurons, microglia, and astrocytes, and exert anti-inflammatory and neuroprotective effects which are highly desirable for the management of traumatic brain injury. From: Cannabinoids in traumatic brain injury and related neuropathologies: preclinical and clinical research on endogenous, plant-derived, and synthetic compounds
In my experience medical CBD oil removes the hurt, the pain of the pain, but leaves the sensation so you know there would be hurt without the CBD oil. No addiction, no high. I highly recommend it.
DMSO, Di Methyl Sulph Oxide, is a systemic pain killer. Only use the "for humans" version. For EXTERNAL use only. ie only rub it on your skin.. Wash the skin you are going to apply to well. No scents or moisturisers. Rub it, only externally, on say your arm and kill your ankle pain.
From the TinyHouse and OffGridResources in New Zealand:
Health Benefits of DMSO by Todd Bailey WIKI How on DMSO Webmd on DMSO rxlist on DMSO