Trigger Point Injection
What Is a Trigger Point Injection?
A trigger point is a hyperirritable knot within a muscle that causes local and referred pain, stiffness, and restricted movement — a hallmark of myofascial pain syndrome. A trigger point injection (TPI) delivers a small amount of local anesthetic, sometimes combined with a corticosteroid or saline, directly into the trigger point. This inactivates the painful knot, provides immediate relief, and helps restore normal muscle function.
How It Works
•The physician carefully palpates the muscle to identify the precise location of the trigger point — often confirmed by a characteristic twitch response or the patient's recognition of their familiar pain pattern.
•A thin needle is inserted into the trigger point, and medication is injected to relax and inactivate the muscle knot.
•The injection disrupts the dysfunctional nerve-muscle firing pattern that sustains the trigger point, allowing the muscle to relax and recover.
What to Expect During the Procedure
•Preparation: The patient sits or lies comfortably with the target muscle exposed and relaxed.
•Duration: Each injection takes only a few minutes; multiple trigger points can be treated in a single 15–30 minute session.
•Anesthesia: A local anesthetic is part of the injection itself; no additional numbing or sedation is required.
•Post-injection: Brief massage or stretching of the muscle may be performed immediately after to enhance the effect.
•Same-day recovery: No downtime is required; most patients return to normal activities the same day.
Conditions Treated
•Myofascial pain syndrome
•Tension-type and cervicogenic headaches
•Neck and upper trapezius pain
•Low back and gluteal muscle pain
•Fibromyalgia-related muscle pain
•Post-injury or post-surgical muscle spasm
Who Is a Good Candidate?
Patients with chronic or recurring muscle pain caused by identifiable trigger points — particularly those whose pain has persisted despite massage, stretching, heat, or oral medications — are excellent candidates. Trigger point injections are especially effective for patients with myofascial pain syndrome who have active, palpable trigger points.
Recovery & Results
Mild soreness at the injection site is common for 24–48 hours after the procedure and is normal. Many patients notice a significant reduction in muscle tightness and referred pain within 1–3 days. Trigger point injections are most effective when combined with a physical therapy or stretching program designed to prevent recurrence. For chronic myofascial pain, a series of injections spaced 2–4 weeks apart is often recommended.
Frequently Asked Questions
How many trigger point injections will I need?
This varies by severity and the number of active trigger points. Some patients achieve lasting relief after 1–2 sessions; others with chronic myofascial pain benefit from ongoing periodic treatment.
Is there a difference between dry needling and trigger point injection?
Dry needling uses a needle alone without medication, while a trigger point injection includes a local anesthetic (and sometimes a steroid). Both target trigger points; your Echo PMR physician will recommend the most appropriate approach for your condition.
Are trigger point injections safe for the neck and upper back?
Yes. When performed by a trained physician, trigger point injections in the neck and upper back are safe and well-tolerated. Your provider will carefully select appropriate sites and use proper technique to ensure your safety.