Sacrococcygeal Ligament Injection
A sacrococcygeal ligament injection is a targeted procedure used to evaluate or temporarily reduce selected pain near the tailbone, coccyx, or sacrococcygeal region. This area includes the lower part of the spine, the coccyx, the sacrococcygeal joint, nearby ligaments, pelvic floor structures, and surrounding soft tissues.
At Manhattan Pain Medicine (MPM), sacrococcygeal ligament injection NYC care begins with diagnosis-first evaluation. The goal is to determine whether pain is coming from the sacrococcygeal ligament, coccyx joint, trauma-related irritation, pelvic floor dysfunction, pudendal neuralgia, ganglion impar pathway, endometriosis overlap, arthritis, orthopedic mechanics, or another pelvic pain generator.
What the Sacrococcygeal Region Is
The sacrococcygeal region is where the sacrum meets the coccyx, commonly known as the tailbone. Ligaments in this region help support the coccyx and surrounding pelvic structures. When this area becomes irritated, inflamed, injured, or mechanically stressed, patients may develop pain with sitting, pain when rising from a seated position, localized tailbone tenderness, or pain that overlaps with pelvic floor symptoms.
Tailbone pain can occur after a fall, childbirth, repetitive pressure, prolonged sitting, direct trauma, coccygeal mobility changes, arthritis, or pelvic muscle guarding. In some patients, pain develops gradually and does not have one clear trigger.
Why Tailbone Pain Is Not Always One Diagnosis
Tailbone pain is often described as coccydynia, but coccydynia can have several causes. Pain may come from the sacrococcygeal ligament, coccyx joint, coccygeal instability, fracture history, local inflammation, pelvic floor dysfunction, pudendal neuralgia, ganglion impar pathway involvement, endometriosis-related pelvic pain, rectal or colorectal conditions, orthopedic mechanics, or central sensitization.
This is why MPM does not treat sacrococcygeal ligament injection as a generic tailbone shot. The evaluation focuses on the patient’s pain location, sitting tolerance, trauma or childbirth history, pelvic symptoms, bowel or bladder symptoms, neurological symptoms, prior imaging, prior treatments, and red flags.
Diagnostic vs. Therapeutic Sacrococcygeal Ligament Injection
A sacrococcygeal ligament injection may be diagnostic, therapeutic, or both. A diagnostic injection helps determine whether the sacrococcygeal ligament or nearby coccygeal region is contributing to symptoms. If the patient experiences temporary relief in the expected area, that response may support the targeted structure as part of the pain picture.
A therapeutic injection is intended to reduce pain for a period of time. Relief may last hours, days, weeks, or longer depending on the medication used and the underlying pain mechanism. Some patients may not respond. MPM uses the degree, timing, and location of relief to help guide the next step.
Sacrococcygeal Ligament Injection vs. Ganglion Impar Block
A sacrococcygeal ligament injection targets the ligamentous or local musculoskeletal structures around the sacrum and coccyx. A ganglion impar block targets a sympathetic nerve structure near the front of the coccyx that may contribute to lower pelvic, perineal, rectal, genital, or tailbone-region pain.
The two procedures may be considered for different reasons. If pain appears local, mechanical, or ligament-related, sacrococcygeal ligament injection may be considered. If symptoms suggest sympathetic pathway involvement, deeper pelvic pain, rectal or perineal pain, or broader coccyx-region pain, ganglion impar block may be considered. MPM determines the target based on the pain pattern and clinical findings.
Tailbone Pain and Pelvic Floor Overlap
Tailbone pain can overlap with pelvic floor dysfunction. Some patients develop protective pelvic floor tightening because sitting hurts. Others have pelvic floor muscle spasm, pelvic dystonia, pudendal neuralgia, endometriosis overlap, or pelvic pain sensitization that contributes to tailbone discomfort.
This overlap matters because an injection alone may not address the full pattern. MPM may coordinate sacrococcygeal ligament injection with pelvic floor physical therapy, pelvic floor trigger point injections, pudendal nerve block, ganglion impar block, medication management, pain psychology, or gynecology, colorectal, or orthopedic evaluation when appropriate.
What Relief After the Injection May Mean
Relief after a sacrococcygeal ligament injection may suggest that the sacrococcygeal ligament or coccygeal region is contributing to pain. If the relief is temporary, it may still provide useful diagnostic information.
If the injection does not help, that does not mean the pain is not real. It may mean that the primary pain generator is different, such as the ganglion impar pathway, pudendal nerve, pelvic floor muscles, coccyx joint, rectal or colorectal condition, endometriosis-related pain, orthopedic mechanics, inflammatory disease, or central sensitization.
Coordinated Care for Chronic Tailbone Pain
Persistent tailbone pain can affect sitting, driving, work, exercise, sleep, bowel movements, pelvic comfort, and emotional wellbeing. Some patients begin avoiding movement or sitting positions because of repeated pain flares. MPM evaluates both the local pain generator and the broader impact of the condition.
Depending on the clinical picture, care may include sacrococcygeal ligament injection, ganglion impar block, pelvic floor trigger point injections, pudendal nerve block, physical therapy, pelvic floor therapy, medication management, pain psychology, orthopedic evaluation, gynecology, colorectal evaluation, or additional imaging.
Risks and Urgent Symptoms
Risks may include pain flare, bruising, bleeding, infection, allergic reaction, temporary numbness, temporary weakness, vasovagal reaction, local anesthetic toxicity, steroid-related side effects when steroids are used, incomplete relief, temporary relief only, or no relief.
Patients should seek urgent evaluation for fever, spreading redness, severe pelvic or abdominal pain, rectal bleeding, blood in stool or urine, new bowel or bladder dysfunction, inability to urinate, saddle anesthesia, new weakness, severe tailbone pain after major trauma, pregnancy-related pelvic pain, unexplained weight loss, cancer-related red flags, severe allergic reaction, or rapidly worsening symptoms.
For selected patients, a sacrococcygeal ligament injection may be an important step in understanding chronic tailbone pain, coccydynia, or pelvic pain overlap. MPM’s role is to determine whether the target is clinically appropriate, whether the procedure can be performed safely, and how the injection fits within a coordinated pain care plan.