An update on acupuncture point injection.

This overview reports the global research advances in acupuncture point injection in the last 5 years. Acupuncture point injection can be applied to a wide range of curable diseases, predominantly those involving pain, but it has poor clinical evidence. Progress has been attained in the mechanism research on acupuncture point injection, but further studies remain necessary. With the reported adverse effects of acupuncture point injection, the need to standardize its clinical procedure has become urgent.