• 06 Jun, 2026
• UnityPain
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What Is a Trigger Point Injection? | Unity Pain

You Are Not Imagining That Knot in Your Muscle

If you have ever felt a tight, tender spot in your neck, shoulder, or back that just will not go away, you are not alone. Many people with chronic pain carry these sore, knotted areas in their muscles for months or even years. They can make it hard to sleep, work, or enjoy daily life. The good news is that there are treatments designed specifically for this kind of pain. One of them is called a trigger point injection. This article will explain what trigger point injections are, how they work, and what you can expect if your doctor recommends one.

What Is a Trigger Point?

A trigger point is a tight, irritable spot inside a muscle. When you press on it, it can hurt right there — or send pain to another part of your body. This is called referred pain. For example, a trigger point in your shoulder muscle might cause a headache. Trigger points can form after an injury, from poor posture, stress, or simply from overusing a muscle over time.

Doctors and researchers believe trigger points form when muscle fibers get stuck in a contracted state and cannot relax on their own. The area can become starved of normal blood flow, which makes the pain worse. Trigger points are very common. They are found in conditions like myofascial pain syndrome, fibromyalgia, tension headaches, and neck or back pain. Many people have them without ever knowing the proper name for what they are feeling.

You might notice a trigger point as a small, hard lump under the skin. Pressing on it may cause a local twitch or a sharp sensation. Sometimes the muscle around it feels stiff or weak. These signs can help a trained provider locate the exact spot that needs treatment.

What Is a Trigger Point Injection?

A trigger point injection is a simple, in-office procedure. Your provider inserts a small needle directly into the trigger point. The injection may contain a local anesthetic, such as lidocaine or bupivacaine, sometimes with a corticosteroid. In some cases, the needle itself — with no medication — is used. This is called a dry needling technique. The goal is to release the tight muscle fibers, restore blood flow, and calm the pain signals coming from that area.

The procedure is usually quick. Most injections take only a few minutes. Your provider will first feel your muscle carefully to find the exact trigger point. They will clean the skin and then guide the needle into the spot. You may feel a brief twitch or sting. After the injection, many patients notice the muscle starting to relax almost right away. Some soreness at the injection site for a day or two is normal and usually mild.

Trigger point injections are considered a minimally invasive treatment. They do not require surgery, anesthesia, or a hospital stay. Because of this, they are a popular option for people who want to try targeted pain relief without major procedures. However, a professional evaluation is always the right first step to find out if this treatment is appropriate for your specific situation.

What Conditions May Benefit From This Treatment?

Trigger point injections are most often used for myofascial pain syndrome, a condition defined by widespread muscle pain and multiple trigger points. They are also used for tension-type headaches and pain in the neck, shoulders, lower back, and hips. Some providers use them to help with jaw pain related to the temporomandibular joint, or TMJ.

People who have not found enough relief from physical therapy, stretching, or oral medications sometimes find trigger point injections helpful as part of a broader pain management plan. They are not a cure, and they work differently for each person. Your provider will look at your full health history before recommending this or any treatment.

Are Trigger Point Injections Safe?

When performed by a trained provider, trigger point injections are generally considered safe. Serious complications are rare. The most common side effects are temporary soreness, minor bruising, or slight bleeding at the injection site. Some people feel a little lightheaded right after the procedure, which usually passes quickly.

There are some situations where trigger point injections may not be recommended. These include people who take blood thinners, have an active infection near the injection site, or are allergic to the medications used. That is why a thorough medical evaluation before any injection is so important. Always tell your provider about all medications and health conditions before the procedure.

What Should You Expect After the Injection?

After a trigger point injection, your provider may encourage you to gently stretch the treated muscle and stay active. Light movement can help the muscle stay loose and may improve results. Applying a warm compress to the area can also help with any post-injection soreness.

How quickly you feel relief — and how long it lasts — varies from person to person. Some people notice improvement after one injection. Others may need a series of injections over several weeks. Trigger point injections are often used alongside other treatments such as physical therapy, stretching programs, and medication management to get the best results. Your care team will help you find the right combination for your needs.

Finding the Right Care for Your Pain

Living with muscle pain is exhausting. It can affect your mood, your relationships, and your ability to do the things you love. If you have been dealing with stubborn knots and aches that have not responded to rest or other basic treatments, it may be time to speak with a pain specialist.

At Unity Pain Management in Modesto, CA, our team offers trigger point injections along with a full range of pain care services. We work with most insurance plans, and we also offer telehealth visits for your convenience. Our goal is to understand your pain and help you find real relief. You deserve care that takes your pain seriously — and a team that will work with you every step of the way.

References

• Lavelle, William M., et al. “Myofascial Trigger Points.” Medical Clinics of North America. 2007.
• Alvarez, David J., and Pamela G. Rockwell. “Trigger Points: Diagnosis and Management.” American Family Physician. 2002.
• Hammi, Claudia, and Bharat Baseluos. “Trigger Point Injection.” StatPearls, National Library of Medicine (NIH). 2023.
• Simons, David G. “Understanding Effective Treatments of Myofascial Trigger Points.” Journal of Bodywork and Movement Therapies. 2002.
• Mayo Clinic Staff. “Myofascial Pain Syndrome.” Mayo Clinic. 2023.