Subcutaneous Injection Sites and Instructions for Safe Self Administration Subcutaneous Injection Sites: Thigh, Abdomen, and Arm Ultrassist What Happens If You Inject B12 Wrong: 6 Red Flags Learn how to administer your own SubQ (subcutaneous) injections at home with confidence. Our step by step guide covers everything you need to know, from preparing your supplies to safely injecting the medication. Our B12 vitamin Store A Manual for you all: What are B12 injections? Where to give B12 injections shots? How to give B12 injections? A Retired RN About Vitamin B12 Injections