Any tips for back injury?

As of now I got a total of 90% including my lower back injury which is only rated at 20%. I need 10% more to get a 100%. I've seen a doctor and I also got reevaluated again for my back but no increase. My doctor only gives me ibuprofen to ease the pain. I've been out of service since 2020 and till now it's hurting like hell. It's got something to do with hernia disc. Is there anything else I can do to increase it?