In an official report, Acupuncture: Review and Analysis of Reports on Controlled Clinical Trials, the World Health Organization (WHO) has listed the following symptoms, diseases and conditions that have been shown through controlled trials to be treated effectively by acupuncture: 
low back pain
neck pain
sciatica
tennis elbow
knee pain
periarthritis of the shoulder
sprains facial pain (including craniomandibular disorders)
headache
dental pain
tempromandibular (TMJ)
dysfunction rheumatoid arthritis
induction of labor
correction of malposition of fetus (breech presentation)
morning sickness
nausea and vomiting
postoperative pain
stroke
essential hypertension
primary hypotension
renal colic
leucopenia
adverse reactions to radiation or chemotherapy
allergic rhinitis, including hay fever
biliary colic
depression (including depressive neurosis and depression following stroke) acute bacillary dysentery
primary dysmenorrhea
acute epigastralgia
peptic ulcer acute and chronic gastritis