B12 Shots at Home: How, Where & How Often to Inject Yourself AZ IV Medics How to Give a Subcutaneous Injection Video & Image Subcutaneous injecting WithYou How to Give a B12 Injection: Step By Step Instructions Subcutaneous injection technique HOW TO GIVE A SUBCUTANEOUS INJECTION Make sure the skin clean, dry, and without wounds Injection sites Position the syringe dominant hand Gather mound of skin between hngers Insert