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TRIGGER POINT INJECTIONS Trigger Point Injections (TPI) are sometimes given for neck pain, headaches, and low back pain to treat muscle spasm and other soft tissue problems. Typically a low dose of anesthetic medication is injected into the trigger point(s) after careful examination. This is a simple out patient procedure and can give excellent relief for headaches of myofascial origin and soft tissue damage. A mixture of lidocaine and marcaine is often used to inject into the muscle trigger point, which helps to relieve muscle spasm. Trigger Point Injections are not painful, and may be repeated on an occasional basis. The mechanism of action is by reducing the focal point of the muscle spasm. TPI are useful in the following situations:
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