How to Give a B12 Injection: Step By Step Instructions What Are B12 Injections and How Do They Work? Metro Healthcare Illustration of sacroiliitis treatment with a corticosteroid injection. Sacroiliitis is an inflammatory condition that affects the sacroiliac joints. These injections work by delivering a powerful anti inflammatory medication directly into the affected B12 Shots vs. IV Infusions: What is the difference? Integrative Medicine, Laser and Aesthetics Vitamin B12 Deficiency Vitamin B12 deficiency happens when the body does not have enough vitamin B12. Vitamin B12 is important for making healthy red blood cells and keeping nerves B12 vitamin Store How to Give an Intramuscular Injection of Vitamin B12