In 2003 the World Health Organization released a report titled "Acupuncture: Review and Analysis of Reports on Controlled Clinical Trials". The report lists four categories of diseases and disorders for which acupuncture is proven to be effective. The first of these catagories, "Diseases, symptoms or conditions for which acupuncture has been proved - through controlled trials - to be an effective treatment" includes:

Adverse reactions to radiotherapy and/or chemotherapy
Allergic rhinitis (including hay fever)
Biliary colic
Depression (including depressive neurosis and depression following stroke)
Dysentery, acute bacillary
Dysmenorrhoea, primary
Epigastralgia, acute (in peptic ulcer, acute and chronic gastritis, and gastrospasm)
Facial pain (including craniomandibular disorders)
Headache
Hypertension, essential
Hypotension, primary
Induction of labour
Knee pain
Leukopenia
Low back pain
Malposition of fetus, correction of
Morning sickness
Nausea and vomiting
Neck pain
Pain in dentistry (including dental pain and temporomandibular dysfunction)
Periarthritis of shoulder
Postoperative pain
Renal colic
Rheumatoid arthritis
Sciatica
Sprain
Stroke
Tennis elbow