5 Signs of Vitamin B12 deficiency that are big red flags

A person's skin will start turning pale yellow due to a lack of healthy red blood cells.

Strange sensation in hands, legs, arms and feet is another signal of vitaminB12 deficiency.

It also causes oral problems knowns as Glossitis. Its signs are redness in the tongue, mouth ulcers, mouth sores, tongue swelling etc.

Its deficiency impairs oxygen delivery because of which a person feels fatigued every now and then.

Another common sign is related to neurological side effects resulting in a severe headache.