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It looks to be vitamin b12 deficiency
Go for certain investigations like CBC,FBS,PPBS,S.CALCIUM,S.B12,D3.
Start Calcium and multivitamin
preparations with complete course of vitamin b12.
Intra muscular injection of B12 will be more helpful.
Take D3 60k with warm milk every week.
Consult your doctor for further guidance and medical management.