According to the NIH Consensus Statement on Acupuncture

Acupuncture, as a therapeutic intervention is effective for nausea and vomiting associated with surgery, chemotherapy and pregnancy. In addition, acupuncture has a significant effect on pain and can be helpful in conditions such as low back pain, osteoarthritis, myofascial pain, menstrual cramps, headache, tennis elbow, carpal tunnel syndrome and fibromyalgia.

Acupuncture has been used much more widely in other parts of the world including both Europe and Asia. Another prestigious organization, the World Health Organization of the United Nations has also created a list of illnesses for which acupuncture is an appropriate treatment. That is:

Musculo-Skeletal, Neurological and Stress Related Conditions:
Back Pain Depression Stroke
Tendonitis Anxiety Neuralgia
Sciatica Stress Cerebral Palsy
Stiff Neck Insomnia Bell's Palsy
Bursitis Headache  
Arthritis Sprains  
Female Conditions:
PMS    
Menstrual Cramps    
Pelvic Inflammatory Disease    
Irregular and Painful Periods  
Infertility    
Vaginitis    
Male Conditions:
Infertility    
Impotence    
Infections and General Conditions:
Colds and Flu Deafness Ulcers
Hayfever Earache Indigestion
Bronchitis Dizziness Colitis
Sore Throat Tinnitus Hemorrhoids
Sinus Infections Poor Eyesight Diarrhea/Constipation
Asthma Hepatitis High Blood Pressure
Herpes Diabetes Hypoglycemia
Achne Eczema Dermatological Conditions

A Closer Look at PAIN Search

According to the National Institute of Health:

"Pain is a critical national health problem. It is the most common reason for medical appointments, nearly 40 million visits annually, and costs this country over $100 billion each year in health care and lost productivity. Pain has a profound effect on the quality of human life. In addition to possible deleterious effects on immune function, pain can cause disruptions in sleep, eating, mobility, and overall functional status. In the hospitalized patient, pain may be associated with increased length of stay, longer recovery time, and poorer patient outcomes, all of which have health care quality and cost implications."

Pain, in general, has an infinite number of possible causes and manifestations, however, muscle constriction based pain caused by chronic over-use, repetitive strain, poor posture and stress is quite common and very effectively relieved by acupuncture, and specifically, by a technique originally invented in the field of physical therapy by Janet Travell. That technique, called myofascial trigger point needling is traditionally executed using injections of local anesthetics with hypodermic needles however, trigger point releases can be effectively executed to reduce chronic muscle constriction based pain with a simple acupuncture trigger point technique.

The release of a trigger point is in fact a release in the exterior layers of the body. When generated with acupuncture needles, there is an actual physiological shift that is both visual and tactile. It is as if a ripple is generated through a tissue which has been previously frozen. Usually, for the patient, it is an experience that is quite unexpected and surprising. From a Chinese medical perspective, the surface of the body must be cleared of constriction and pain before one could effectively enter into the interior of the body and treat it thoroughly. By inspiring the surface tissue to open, acupuncture can then help to create a sustained shift in a body's habitual pain pattern and conditions occurring more deeply in the body are given a greater opportunity to heal.