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Pain on breast and back could be due to muscular pain
but sifting to elbow suggests nerve
involvement at cervical region.burning sensation at feet also indicate B12 deficiency.Go for CBC,S.B12,S.Cal. Start intra muscular inj.b12 every alternate day. Oral NSAIC with muscle relaxant
,local gel will be helpful.Diabetes
should be ruled out after FBS,PPBS.
Cervical x-ray is necessary.
Consult you physician for further guidance and medical management.