The York acupuncture safety study: prospective survey of 34 000 treatments by traditional acupuncturists

Recent reports have highlighted the importance of having good evidence on the safety of acupuncture. 1 2 Sound evidence on the risks associated with acupuncture is, however, scarce.3 Our primary aim, therefore, was to describe the type and frequency of adverse events after acupuncture. A secondary aim was to examine mild transient reactions associated with acupuncture, some of which may indicate a positive response to treatment.