Here are some symptoms of B12 deficiencies to look out for. If you think you or a loved one are experiencing the following symptoms, please recommend that they give us a call for an appointment and consultation.strange sensations, numbness, or tingling in the hands, legs, or feetdifficulty walking (staggering, balance problems)anemiaa swollen, inflamed tonguedifficulty thinking and reasoning (cognitive difficulties), or memory lossweaknessfatigue