burning pain after b12 injection Is Your Site Reaction Normal or Severe? 7 Key Facts how much

You may be at risk of vitamin B12 deficiency if you fall into any of the aforementioned categories

Characterization of cytokine-induced hyperalgesia

You should contact your GP if: Your B12 level is significantly elevated (markedly above your local laboratory's reference range) without obvious explanation such as supplementation You have persistent elevation on repeat testing You experience unexplained symptoms such as unintentional weight loss, persistent fatigue, night sweats, fever, or abdominal discomfort You notice unusual bruising, bleeding, or enlarged lymph nodes You have jaundice (yellowing of skin or eyes) or other signs of liver disease You have a history of liver disease, kidney disease, or blood disorders Immediate medical attention (contact NHS 111 or attend A&E) is warranted if you experience severe symptoms such as significant bleeding, severe abdominal pain, confusion, or signs of acute illness, though these would rarely be directly related to elevated B12 itself

It also gives you a chance to ask the right questions, monitor your progress, and build a plan that supports real results rather than quick fixes

October 21, 2025