Trigger point injection is a procedure used to treat painful areas of muscle that contain trigger points, or knots of muscle that form when muscles do not relax. Many times, the knots can be felt under the skin. Trigger points may irritate the nerves around them and cause referred pain, or pain that you can feel in another part of the body.

The injection contains a local anesthetic that causes the trigger point to become inactive and the pain is reduced. A trigger point injection is used to treat many muscle groups, especially those in the arms, legs, lower back, and neck.

What can you expect after the injection?

You should feel relief right away after the trigger point injection, as the medicine will numb any pain from the shot. You may then feel some soreness, as you might after a flu shot. Within one or two days, the soreness should fade and you will often begin to feel pain relief. It is important to incorporate trigger point injections into a multimodal treatment plan that often includes physical therapy and chiropractic care.

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