A Transversus Abdominis Plane (TAP) block is an ultrasound-guided injection that targets the sensory nerves of the abdominal wall to help diagnose and relieve chronic abdominal-wall pain and persistent post-surgical pain.
OVERVIEW
What a TAP block is and how it works
The transversus abdominis plane is a thin tissue layer between the internal oblique and transversus abdominis muscles of the abdominal wall. Running through this plane are the thoracoabdominal nerves (roughly T7 through L1) that carry sensation from the skin, muscles, and lining of the belly. When these nerves become irritated, entrapped in scar tissue, or sensitized after surgery, they can produce localized, often sharp or burning pain in the abdominal wall itself rather than pain coming from an organ inside the abdomen.
During a TAP block, your physician uses ultrasound to place local anesthetic into this plane, temporarily interrupting the pain signals these nerves carry. The procedure can serve two purposes. As a diagnostic tool, meaningful relief after the injection helps confirm that the abdominal wall — not an internal source — is generating the pain. As a therapeutic tool, anesthetic combined with a corticosteroid may be used to calm nerve irritation and aim for longer-lasting relief.
CONDITIONS
Conditions a TAP block may help
A TAP block is most often considered when abdominal-wall pain is well localized and reproducible on examination — for example, when the pain worsens as you tense your abdominal muscles.
Commonly treats
YOUR VISIT
What to expect
Before
Your physician reviews your history, prior surgeries, and an exam that pinpoints the painful area. Please tell us about blood thinners, allergies, and any chance of pregnancy. The skin is cleaned and a local numbing agent is applied at the injection site.
During
You lie on your back while live ultrasound lets the physician see the muscle layers and guide the needle precisely into the transversus abdominis plane before the medication is injected. Most patients feel pressure rather than sharp pain, and the injection itself usually takes only a few minutes.
After
You rest briefly and are monitored before heading home, usually the same day. You may notice numbness or relief within hours as the anesthetic takes effect. We ask you to track your pain over the following days, since that response guides the next steps in your care.
Because ultrasound is used to visualize the muscle planes in real time, no radiation is involved. Arrange for someone to drive you home if sedation is used. Many patients resume light activity the next day, though your physician will give recovery guidance specific to your situation.
QUESTIONS
Frequently asked questions
Is a TAP block diagnostic or therapeutic?
It can be both. The pattern and degree of relief after the injection help confirm whether your pain is coming from the abdominal wall, which is the diagnostic role. When a corticosteroid is added, the goal is also to reduce nerve irritation for more lasting relief. Your physician will explain which purpose applies to your specific block.
How long does relief last?
This varies from person to person. The local anesthetic provides short-term relief that helps confirm the source of your pain, while any steroid component may extend relief over a longer period. Because individual responses differ, we do not promise a specific duration — instead, we use your results to plan further care.
What are the risks?
TAP blocks are generally well tolerated. As with any injection, possible risks include bleeding, infection, temporary soreness at the site, or a reaction to the medication; because the block uses local anesthetic, your team also watches for the uncommon effects that can follow. Ultrasound guidance lowers risk by letting the physician see the abdominal-wall layers and the deeper structures beneath them. Your physician will review the risks relevant to you before the procedure.
CARE IN GRESHAM & PORTLAND
Where a TAP block fits in your care
At Columbia Pain & Spine Institute, our dual board-certified, fellowship-trained physicians perform TAP blocks as part of a broader approach to abdominal-wall and post-surgical pain for patients across Gresham, Portland, and the greater Portland metro area. A TAP block is one of several targeted nerve block options we offer, and it is often considered alongside other diagnostic and therapeutic injections.
If you have ongoing abdominal-wall pain, our team in Gresham, Oregon can help determine whether a TAP block is appropriate for you.