A systematic review undertaken by researchers in Portugal looking at acupuncture and anxiety, suggests there is good scientific evidence for the use of acupuncture to treat the disorder. Thirteen studies were selected and all reported a significant decrease in anxiety for the acupuncture treatment group relative to the control group. Acupuncture was also associated with fewer side effects compared with conventional treatment.
(Acupuncture and electroacupuncture for anxiety disorders: A systematic review of the clinical research. Complementary Therapies in Clinical Practice, May 2018.)