Subcutaneous (SC) and Intramuscular (IM) Injections Must Knows for Subcutaneous administration: Pinch skin with non dominant hand and hold syringe with dominant hand Always inject: 2 inches away from umbilicus (for abdomen) 3 inches Common IM Injection Sites Deltoid (Upper Arm) Location: About 23 finger widths below the acromion process (shoulder bone). Best for: Vaccines and small volume injections (1 mL). Notes: Easy to access but limited How to Give B12 Injection: Safe Method & Tips Ivy Grove Surgery : Self administration of B12 injection Where To Give B12 Injection In Arm HOW TO SELF INJECT B12 AT HOME with Dr. Tyler Rogers If you've been prescribed vitamin B12 shots or exploring at home wellness, this step by step guide will walk you through how