Acupuncture has been proven to remedy acute and chronic ailments, relieve pain, enhance recuperative powers, and strengthen the immune system. Acupuncture stimulates the release of opiate-like hormones and induces a state of deep relaxation, balance, and healing. People are often surprised to discover that acupuncture treatments are quite relaxing. During a treatment, extremely fine, single-use, sterile needles are inserted at specific locations on the body known as acupuncture points. These points are stimulated to restore the normal balance and flow of energy throughout the body. When the needles are inserted one may experience a sensation of tingling, heaviness, or warmth at the location of the acupuncture point or radiating outward along the associated meridian. The length and frequency of acupuncture treatments will vary according to the nature of the condition being treated and the underlying constitution of the patient. Acute situations generally require fewer visits over a shorter period of time, while chronic conditions tend to require more extensive treatment. Frequently, acupuncture is used as a preventative modality, for example, coming in for treatment seasonally, or every few months to recharge the immune system, prepare for changes in weather, and to manage stress.