weight loss diet Low Vitamin B12 and low iron levels are causes of anaemia. Anaemia is when you do not have enough healthy red blood cells to carry the oxygen you need around your body. When anaemia first develops, symptoms can be loss of appetite, constipation, headaches, irritability and difficulty concentrating. Another major indicator that your B12 levels are seriously low is paraesthesia.If your skin has ever felt the sensation as if something was crawling on your skin, or had numbness or itching for no apparent reason, you may have experienced paresthesia.Almost everyone has experienced paresthesia on occasion which can come about for no apparent reason.One of the most common times people get that familiar feeling of pins and needles is when their arms or legs fall asleep and they are unable to move it until the sensation has returned.READ MORE: Type 2 diabetes symptoms: The sign in your hands you could have the chronic condition Vitamin B12 deficiency symptoms: Paraesthesia is a sign of low B12 levels (Image: Getty Images)In a study published in the US National Library of Medicine National Institutes of Health, vitamin B12 deficiency neuropathy, a rare diagnosis in young adults was further investigated.The study said: “The diagnosis of Vitamin B12 deficiency is challenging in resource limited-settings due to limited access to diagnostic tools and unfamiliarity with the disease, owing to its rarity especially in young people.“A 28-year-old female presented with progressive burning painful sensations on the upper trunk, paraesthesia and numbness of the upper and lower limbs for a period of five years.“Before presenting to us, she had consulted in numerous health institutions for which she had been treated for diverse pathologies with no relief of symptoms.“After clinical and laboratory evaluation, a diagnosis of vitamin B12 deficiency-associated neuropathy was made.“She was placed on oral vitamin B12 supplements at 2 mg daily for three months.“Follow up was marked by good clinical recovery after one month of therapy.” DON’T MISSHigh blood pressure: Bleeding from this part of the body could signal the condition [INSIGHT]Monty Don health: ‘I think I’m dying’ – Gardeners’ World star explains deadly symptoms [INSIGHT]How to lose visceral fat: The easiest and most effective way to help burn belly fat [TIPS] Symptoms tend to develop slowly and may not be recognized immediately when it comes to a B12 deficiency.However, as the condition worsens, common symptoms experienced may include:Weakness and fatigueLight-headedness and dizzinessPalpitations and rapid heartbeatShortness of breathA sore tongue that has a red, beefy appearanceNausea or poor appetiteWeight lossDiarrhoeaYellowish tinge to the skin and eyes Vitamin B12 deficiency symptoms: The sensation is often described as pins and needls (Image: Getty Images)The Framingham Offspring Study found that nearly 40 percent of people aged 26 to 83 years had B12 levels in the “low normal” range—a level at which neurological symptoms may begin to develop. This becomes a concern as low B12 levels cause an array of neurologic and psychiatric manifestations with a person not realising the cause.B12 deficiency has been severely underplayed in health care and largely ignored in favour of more recognized and more expensive-to-treat diagnoses said Pharmacy Times.It added: “This has resulted in both substandard care and malpractice, costing millions of individuals their health.” TreatmentTo prevent vitamin B12 deficiency, it’s strongly advised for vegans they should take adequate amounts of vitamin B12 supplements to make up for the shortage in their diet.For people who cannot absorb B12, the condition cannot be prevented.However, once it is diagnosed, regular injections of vitamin B12 will prevent symptoms from returning.If you have been experiencing more pins and needles sensation in your body speak with your GP who can check your B12 levels.