medical negligence by service doctors

i am serving personal (5 yrs service.)in indian airforce. i had a lower back enjury due to service work and i have a enjury report signed by medical officer and my commanding officer.i am suffering continuous back pain and i also feel numbness in my left leg. i got a mri scan from base hospital delhi cantt and report of mri scan which signed by a senior army medical officer reveals that i have disc bulge at l4-l5 level which is compressing my left leg nerve.i am forced to do physical activity like weight lifting , running etc. but i am incapable to do those activity due to my back problem.pls suggest me that what should i do ? can i file a case against it,because service doctor are saying that i am fit.