3. Pins and Needles: Over time, B12 deficiency can cause nerve damage, resulting in a tingling sensation and even numbness in the hands and feet.
4. Pale skin: Pale or yellow skin (known as jaundice) develops when the body is not able to produce enough red blood cells.
5. Anxiety or Depression: Because B12 aids in the production of neurotransmitters such as dopamine and serotonin, a deficiency may potentially affect a person's mood, causing irritability, anxiety or depression.
6. Mouth pain: A B12 deficiency can cause you to lose the little bumps on your tongue (papillae), making it appear smooth, swollen, and red. It may also trigger a tingling feeling in the tongue or a burning and itching sensation in the mouth.