how to give a b12 injection in the thigh Vitamin Injections Best Vitamin B12 Injection Sites:
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If pain or redness persists or you notice swelling, contact your healthcare provider to determine whether you might be experiencing a local reaction to the injection or have an infection

Mild side effects can include short-term injection-site redness and very rarely transient mild headache in the first week
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Effectiveness of therapeutic lumbar transforaminal epidural steroid injections in managing lumbar spinal pain
