Take a diet rich in Vit B12 which should include meat and animal products, cheese, such as beef, liver, salmon, cod,
and eggs. Take
B12 supplements
and breakfast cereals fortified with
vitamin B12. Finding the cause is important.
Since I cannot examine you and know other related conditions you may be having, nor is a detailed history possible on net, I have listed the various possibilities that should be looked into. Please consult your PCP for primary examination followed by proper referral.