hello sir .i am 23 years old male i have lower back pain (lumbar region) since 2 years .mostly everytime i feel continous dull pain .the pain in not radiating to my lower limb.i took xray, done cbc,urine test,and one dr, told me to do HLA-B7 ,MY All the results are clear normal,i also done the physiotherapy but my pain is not vanish.i took a of NSAIDS ,vitamins but nothing banefit,plz give me so suggestion.