Acupuncture point injection is a technique derived from intramuscular injection that has been used in China since the 1950s. It can be used to treat over 148 types of ailments affecting various body systems. The mechanism of action involves activating mast cells within the acupoint area, increasing angiogenesis and blood flow. It has a more sustained effect than traditional acupuncture. While relatively safe, potential adverse effects include infection and organ puncture. Standardization of techniques such as skin sterilization and single-use syringes helps ensure safety. An example treatment outlined is for chronic gastritis using vitamin B12 injected into specific acupoints over 10 sessions.