The Small but Mighty Pain Generator: The Coccyx

Pain with sitting is a common complaint that patients may present to the clinic with. While excess sitting has been shown to be detrimental to the human body, sitting is part of our everyday culture ranging from sitting at a meal, traveling in the car, or doing work at a desk. Often, physical therapists disregard the coccyx or tailbone as the possible pain generator, simply because they are fearful of assessing it, have no idea where it is, or have never learned about it being a pain generator in their education.

Coccydynia is the general term for “pain over the coccyx.” Patients with coccydynia will complain of pain with sitting or transitioning from sit to stand. Despite the coccyx being such a small bone at the end of the spine, it serves as a large attachment site for many important structures of interest that are important in pelvic floor support and continence: ¹

• Anterior: Levator ani muscles, Sacrococcygeal ligament
• Lateral: Coccygeal muscles, Sacrospinous ligament, Sacrotuberous ligament, Glute maximus muscle fibers
• Inferiorly: Iliococcygeus

Along with serving as a major attachment site for the above structures it provides a support for weightbaring in the seated position and provides structural support for the anus. Women are five times more likely to develop coccydynia than men, with the most common cause being an external trauma like a fall, or an internal trauma like a difficult childbirth. ^1,2 In a study of 57 women suffering from postpartum coccydynia, most deliveries that resulting in coccyx pain were from use of instruments such as a forceps delivery or vacuum assisted delivery. A BMI over 27 and having greater than or equal to 2 vaginal deliveries resulted in a higher rate of coccyx luxation during birth. ³ Other causes of coccyx pain can be non traumatic such as rapid weight loss leading to loss of cushioning in sitting, hypermobility or hypomobility of the sacrococcygeal joint, infections like a pilonidal cyst, or pelvic floor muscle dysfunction. ¹ When assessing a patient with coccyx pain, it is also of the upmost importance to rule out red flags, as there are multiple cases cited in the literature of tumors such as retrorectal tumors or cysts being the cause of coccyx pain. These masses must be examined by a doctor to determine if they are malignant or benign, and if excision is necessary. Sometimes these masses can be felt as a bulge on rectal examination. ^4,5

A multidisciplinary approach including physical therapy, ergonomic adaptations, medications, injections, and, possibly, psychotherapy leads to the greatest chance of success in patients with prolonged coccyx pain. ¹ Special wedge shaped sitting cushions can provide relief for patients in sitting and help return them to their social activities during treatment. Physical therapy includes manual manipulation and internal work to the pelvic floor muscles to alleviate internal spasms and ligament pain. Intrarectal coccyx manipulation can potentially realign a dislocated sacrococcygeal joint or coccyx. ¹ Taping methods can be used as a follow up to coccyx manipulation to help hold the coccyx in the new position and allow for optimal healing. Often coccyx pain patients have concomitant pathologies such as pelvic floor muscle dysfunction, sacroilliac or lumbar spine pain, and various other orthopedic findings that are beneficial to address. When conservative treatments fail, injections or a possible coccygectomy may be considered.

Luckily conservative treatment is successful in about 90% of cases. ¹ All of the above conservative tools will be taught in the upcoming Coccyx Pain Evaluation and Treatment course on April 23-24th, 2016 in Columbia, MO taught by Lila Abbate PT, DPT, OCS, WCS, PRPC. By learning how to treat coccyx pain appropriately, you will be a key provider in solving many unresolved sitting pain cases that are not resolved with traditional orthopedic physical therapy.

1. Lirette L, Chaiban G, Tolba R, et al. Coccydynia: An overview of the anatomy, etiology, and treatment of coccyx pain. The Ochsner Journal. 2014; 14:84-87.
2. Marinko L, Pecci M. Clinical Decision Making for the Evaluation and Management of Coccydynia: 2 Case Reports. JOSPT. 2014; 44(8): 615
3. Maigne JY, Rusakiewicz F, Diouf M. Postpartum coccydynia: a case series study of 57 women. Eur J Phys Rehabil Med. 2012; 48 (3): 387-392.
4. Levine R, Qu Z, Wasvary H. Retrorectal Teratoma. A rare cause of pain in the tailbone. Indian J Surg. 2013; 75(2): 147-148.
5. Suhani K, Ali S, Aggarwal L, et al. Retrorectal cystic hamartoma: A problematic tail. J Surg Tech Case Rep. 2104; 6(2): 56-60.