What Happens If You Inject B12 Wrong: 6 Red Flags What Causes B12 Side Effects? Anyone think the b12 jabs sting like hell. Ive got one tomorrow and i dread it everytime. The needle going in dosnt hurt. Its when they push the liquid in! The Risks of An Incorrect Intramuscular Injection
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why does b12 injection sting How to self-inject intramuscular vitamin B12 - Overview