vitamin b12 injection technique Sites: All You Need to Know Injection Site For B12 Shot

If you feel severely nauseous every week after your injection, you are less likely to continue long-term therapy

Q: Do I need to make an appointment for injections

Contact your GP if: You have been found to have elevated B12 levels and have not received an explanation or follow-up plan You are taking high-dose B12 supplements without medical supervision You develop new symptoms whilst taking B12 supplements, particularly skin changes, persistent headaches, or gastrointestinal symptoms You have risk factors for liver disease (alcohol excess, viral hepatitis, obesity) and have elevated B12 You experience unexplained weight loss, night sweats, or persistent fatigue alongside elevated B12 Seek urgent medical attention if you experience: Jaundice (yellowing of skin or eyes) Severe abdominal pain or swelling Unexplained bruising or bleeding Confusion or altered consciousness Severe, persistent vomiting These symptoms may indicate serious underlying conditions such as acute liver failure, haematological emergencies, or other critical illness requiring immediate assessment

Thinner individuals may require shorter needles, while those with more muscle or adipose tissue may need longer ones to reach the muscle layer effectively

During initial treatment of severe deficiency, hypokalaemia (low potassium) can develop

Flu shots can cause arm swelling due to your body's immune response, but if the swelling worsens or persists, it may signal a more serious issue