Vitamin B12 is a crucial vitamin the body requires to operate efficiently. It helps to prevent a type of anaemia called megaloblastic anaemia that makes people tired and weak. Having a deficiency occurs when a lack of vitamin B12 or folate causes the body to produce abnormally large red blood cells that cannot function properly. Those most at risk of being deficient are vegans and vegetarians. The NHS said: “Vitamin B12 deficiency anaemia occurs when a lack of vitamin B12 caused the body to produce abnormally large red blood cells.
It states: “If you have any unusual undiagnosed symptoms, perhaps you should consider whether you have a vitamin B12 deficiency.
“Experiencing a short stabbing, tingling pain in the palm of one or both hands could be a sign of a B12 deficiency. This occurs suddenly and for no apparent reason in a spot directly below the ring finger, approximately where the first palm crease is.
“If B12 deficiency is not treated, a tingling pain may begin to occur along the outside edge of the hand, starting from the wrist.
“This pain occurs when the wrist is flexed backward.”
Other unusual symptoms of a B12 deficiency
TPA said: “Experiencing any of these symptoms could mean you are deficient and include either an itchy or tingling tongue, white spots in the skin, sores at the corners of the mouth, nerve shock, shortness of breath, facial pain or a tingling along the back.
“These symptoms are certainly not all-inclusive.
“There are other possible symptoms deliberately omitted because they’re relatively rare and/or debatable. The symptoms are for borderline to mild deficiencies.”