Coccyx fractures are typically caused by direct trauma (falls onto the buttocks) and are managed conservatively in the vast majority of cases, as imaging rarely changes acute management and surgical intervention is almost never required acutely. [1-2] Coccydynia accounts for only 1%–3% of back pain presentations, with women affected approximately 5 times more frequently than men. [2-3]
1. History
- Mechanism: Direct fall onto buttocks (most common), kick/direct blow, repetitive microtrauma (cycling, rowing), or obstetrical injury [4-5]
- Onset: Acute onset of tailbone pain immediately after trauma; ask about exact position at time of impact
- Location: Midline pain below the sacrum and above the anus [6]
- Aggravating factors: Sitting (especially on hard surfaces), sit-to-stand transitions, prolonged sitting, defecation, sexual intercourse [2][6]
- Alleviating factors: Standing, lying down, leaning forward while seated
- Severity and progression: Quantify with numeric pain scale; ask about functional limitations (inability to sit at work, drive, etc.)
- Important negatives: Absence of bowel/bladder dysfunction, absence of lower extremity weakness/numbness, no saddle anesthesia, no fever, no weight loss
2. Alarm Features
- Cauda equina syndrome: New urinary retention, fecal incontinence, saddle anesthesia, progressive bilateral lower extremity weakness — requires emergent MRI and surgical consultation [7-8]
- Associated sacral fracture: High-energy mechanism, pelvic instability, hemodynamic compromise — consider CT pelvis
- Rectal injury: Open fracture with rectal laceration (rare but surgical emergency); ask about rectal bleeding
- Pathologic fracture: Pain without trauma, history of cancer, unexplained weight loss — warrants advanced imaging [8]
- Infection: Fever, perianal abscess, immunosuppression, IV drug use
- Neurologic deficit: Any new weakness, numbness, or gait disturbance
3. Medications
- First-line: Topical NSAIDs (e.g., diclofenac gel) — recommended as first-line for musculoskeletal injuries by ACP/AAFP guidelines [9]
- Second-line: Oral NSAIDs (ibuprofen 400–600 mg q6–8h, naproxen 250–500 mg q12h) or acetaminophen (650–1000 mg q6–8h) [9-10]
- Stool softeners: Docusate sodium to prevent constipation and straining, which exacerbates pain
- Short-term opioids: Reserved for severe pain unresponsive to NSAIDs; limit to <7 days [11]
- Avoid: Prolonged opioid courses; NSAIDs in patients with GI bleeding risk, renal disease, or cardiovascular disease without gastroprotection [10]
- Refractory cases: Local corticosteroid injection into the sacrococcygeal region or ganglion impar block can provide diagnostic and therapeutic benefit [2-3]
4. Diet
- High-fiber diet and adequate hydration to prevent constipation — straining during defecation significantly worsens coccygeal pain
- Stool softeners should be co-prescribed if opioids are used
- No specific dietary triggers or restrictions beyond constipation prevention
5. Review of Systems
- GI: Constipation, rectal bleeding, pain with defecation, tenesmus
- GU: Urinary retention, incontinence, dyspareunia
- Neuro: Lower extremity weakness, numbness, saddle anesthesia, gait changes
- MSK: Concurrent low back pain, hip pain, pelvic pain
- Constitutional: Fever, weight loss, night sweats (to rule out malignancy/infection)
- OB/GYN: Recent delivery (obstetrical fractures are a distinct subtype) [4]
6. Collateral History and Family History
- Collateral: Witnessed mechanism of injury, height of fall, surface landed on; prior episodes of tailbone pain
- Obstetric history: Difficult or prolonged vaginal delivery, instrumental delivery (forceps) — associated with extension-type coccyx fractures [4]
- Family history: Osteoporosis, bone density disorders
- Social context: Occupation requiring prolonged sitting (office workers, truck drivers); impact on work capacity and daily function
7. Risk Factors
- Female sex (5:1 female-to-male ratio) [3]
- Obesity or elevated/fluctuating BMI — increased loading on the coccyx while seated [2]
- Osteoporosis or chronic corticosteroid use
- Prolonged sitting or repetitive microtrauma (cycling, rowing)
- Vaginal delivery — especially prolonged labor or instrumental delivery [4]
- Older age — increased fracture risk with low-energy mechanisms
- Thin body habitus — less gluteal padding
8. Differential Diagnosis
- Coccyx contusion/bruise (no fracture line on imaging) — most common; identical management
- Sacrococcygeal subluxation/dislocation — may coexist with fracture; dynamic radiographs help differentiate [4-5]
- Sacral fracture — higher-energy mechanism; evaluate with CT if suspected
- Pilonidal cyst/abscess — posterior midline swelling, erythema, drainage; distinct exam findings [5]
- Perianal/anorectal abscess — fever, fluctuance, perianal tenderness
- Proctalgia fugax — episodic, fleeting rectal pain without trauma history
- Levator ani syndrome — chronic aching rectal pressure, tenderness on palpation of levator muscles
- Sacroiliac joint dysfunction — pain more lateral, positive provocative SI joint tests
- Lumbosacral pathology — radiculopathy, disc herniation; neurologic findings on exam
- Chordoma or sacrococcygeal neoplasm — insidious onset, no trauma, progressive; requires MRI [5]
9. Past Medical History
- Prior coccyx injuries or fractures (recurrent instability increases risk of chronic coccydynia)
- Osteoporosis or osteopenia
- Chronic corticosteroid use
- History of pelvic or sacral surgery
- Inflammatory conditions (e.g., ankylosing spondylitis — sacroiliac involvement)
- Prior obstetric trauma
- Chronic pain conditions or psychiatric comorbidities (predictors of chronification) [12]
10. Physical Exam
- Inspection: Ecchymosis over the sacrococcygeal region; look for swelling, skin breakdown, or sinus tracts (pilonidal)
- Palpation: Focal tenderness directly over the coccyx is the hallmark finding — palpate externally over the dorsal coccyx. Point tenderness with a history of trauma is suggestive of fracture [6][8]
- Rectal exam: Bimanual palpation (one finger intrarectal, one external) to assess coccygeal mobility, crepitus, and reproduce pain; also evaluates rectal tone and rules out rectal injury [6]
- Neurologic exam: Lower extremity strength, sensation (including perianal/saddle), rectal tone, reflexes — to exclude cauda equina syndrome
- Vital signs: Generally normal; tachycardia or hypotension should raise concern for associated pelvic injury
11. Lab Studies
- Routine labs are not indicated for isolated coccyx fracture
- If infection suspected: CBC, ESR, CRP
- If pathologic fracture suspected: CBC, CMP, ESR, alkaline phosphatase, consider PSA/SPEP as appropriate
- If high-energy mechanism with hemodynamic instability: Type and screen, CBC, lactate
12. Imaging
- In the ED, coccyx radiographs have limited clinical impact and rarely change management. A study of 687 patients showed only an 8.4% positivity rate, with no surgical interventions in any positive case. The authors recommended eliminating coccyx radiographs from ED practice in favor of clinical-based conservative treatment. [1]
- Lateral coccyx radiograph: If obtained, lateral view is most useful; AP view adds little. Static radiographs may appear normal even with fracture [5]
- Dynamic radiographs (seated and standing lateral views): Preferred initial imaging for outpatient evaluation of persistent coccydynia; can reveal pathologic coccygeal motion (hypermobility, subluxation) [2][5][13]
- CT: Superior for delineating fracture lines, displacement, and bony anatomy; indicated if sacral fracture or complex injury suspected [5]
- MRI: Best for soft tissue evaluation, bone marrow edema, infection, or neoplasm; indicated when symptoms persist or red flags are present [2][5]
- When imaging is unnecessary: Isolated low-energy coccyx trauma with classic presentation and no red flags — clinical diagnosis is sufficient for ED management
13. Special Tests
- Dynamic seated/standing lateral radiographs: Gold standard for assessing coccygeal instability in the outpatient setting; measures sacrococcygeal angle changes [2][14]
- Maigne classification of coccyx fractures: Three types based on mechanism — flexion (Type 1, upper coccyx), compression/nutcracker (Type 2, middle coccyx), and extension/obstetrical (Type 3, lower coccyx) [4]
- Intrarectal coccygeal mobility testing: Bimanual assessment of coccygeal motion and pain reproduction [15]
- Ganglion impar block: Diagnostic and therapeutic — pain relief confirms coccygeal origin [2-3]
14. ECG
- Not routinely indicated for isolated coccyx fracture
- Consider ECG if the fall was preceded by syncope, presyncope, or palpitations to evaluate for cardiac arrhythmia as the cause of the fall (especially in elderly patients)
15. Assessment
Coccyx fractures are a clinical diagnosis in the ED setting, characterized by focal coccygeal tenderness after direct trauma. The condition is almost universally managed conservatively. Three fracture types have been described: flexion fractures (most common traumatic type, usually heal spontaneously), compression/"nutcracker" fractures (often unstable), and extension/obstetrical fractures (progressive fragment separation over time). [4]
Key complications to consider:
- Chronic coccydynia: Develops in a significant proportion; longer duration of symptoms before treatment is associated with unfavorable outcomes (OR 1.04 per month). Over 50% of patients with chronic coccydynia have persistent symptoms at 36 months despite conservative treatment [12]
- Coccygeal instability/subluxation: May develop after fracture, particularly with nutcracker and obstetrical types [4]
- Pain chronification: Patients are at risk, and early multimodal treatment is recommended [3]
16. Treatment Plan
Initial stabilization and acute management
- Ice to the sacrococcygeal region for 15–20 minutes several times daily in the first 48–72 hours
- Coccygeal cushion (wedge-shaped or cut-out cushion that offloads the coccyx) — avoid donut-type cushions, which may increase perineal pressure. Wedge cushions with a posterior cutout are preferred [6][16-17]
- Avoid prolonged sitting; lean forward when seated to shift weight to ischial tuberosities
Pharmacologic
- Topical NSAIDs as first-line [9]
- Oral NSAIDs (ibuprofen 400–600 mg q6–8h or naproxen 500 mg q12h) ± acetaminophen [9-10]
- Stool softeners (docusate) to prevent constipation
- Short-course opioids only for severe, refractory pain
Subacute/refractory (outpatient)
- Pelvic floor physical therapy, coccygeal manipulation, and stretching of the levator ani [13][18]
- Local corticosteroid injection into the sacrococcygeal joint [3][13]
- Ganglion impar block for persistent pain [2-3]
- Radiofrequency ablation for refractory cases [3]
Surgical (rare)
17. Disposition
- Discharge (vast majority): Isolated coccyx fracture/contusion with no red flags, stable vitals, adequate pain control, and ability to ambulate
- Observation/admission criteria: High-energy mechanism with concern for associated pelvic/sacral fracture, hemodynamic instability, inability to ambulate, intractable pain, or neurologic deficits
- Specialist consultation triggers:
- Orthopedics/spine surgery: Suspected sacral fracture, open fracture, neurologic deficit
- General surgery: Suspected rectal injury
- Neurosurgery: Cauda equina syndrome
- PM&R or pain management: Refractory coccydynia (outpatient referral)
18. Follow Up / Return Precautions
- Follow-up: Primary care or orthopedics in 1–2 weeks for pain reassessment; earlier if symptoms worsen
- Expected recovery: Most fractures heal in 4–6 weeks, though residual discomfort may persist for several months. Flexion-type fractures generally heal spontaneously [4]
- Return precautions — instruct patients to return immediately for:
- New or worsening numbness in the groin/saddle area
- Loss of bowel or bladder control
- Progressive lower extremity weakness
- Fever or signs of infection
- Worsening pain despite appropriate analgesia
- Patient counseling: Reassure that this is a self-limited condition in most cases; emphasize cushion use, activity modification, and constipation prevention. Warn that sitting discomfort may persist for weeks to months and does not indicate a complication
References
1. Sacrum and Coccyx Radiographs Have Limited Clinical Impact in the Emergency Department. — Hanna TN, Sadiq M, Ditkofsky N, et al. AJR. American Journal of Roentgenology. 2016.
2. Disorders of the Coccyx and Sacrococcygeal Joint: Etiology, Diagnosis, and Management Strategies. — Carayannopoulos NL, Montaquila NS, Lewis AM, et al. The American Journal of Medicine. 2026.
3. Coccygodynia: Diagnosis and Treatment. — Benditz A, Thoma R. Deutsches Arzteblatt International. 2025.
4. Classification of Fractures of the Coccyx From a Series of 104 Patients. — Maigne JY, Doursounian L, Jacquot F. European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society. 2020.
5. Imaging Coccygeal Trauma and Coccydynia. — Skalski MR, Matcuk GR, Patel DB, et al. Radiographics : A Review Publication of the Radiological Society of North America, Inc. 2020.
6. Coccydynia: Tailbone Pain. — Foye PM. Physical Medicine and Rehabilitation Clinics of North America. 2017.
7. Management of Low Back Pain: Guidelines From the VA/DoD. — Buelt A, McCall S, Coster J. American Family Physician. 2023.
8. Acute Low Back Pain: Diagnosis and Management. — Earwood JS, Doles NA, Russell RS. American Family Physician. 2025.
9. Nonpharmacologic and Pharmacologic Management of Acute Pain From Non-Low Back, Musculoskeletal Injuries in Adults: A Clinical Guideline From the American College of Physicians and American Academy of Family Physicians. — Qaseem A, McLean RM, O'Gurek D, et al. Annals of Internal Medicine. 2020.
10. Pharmacologic Therapy for Acute Pain. — Amaechi O, Huffman MM, Featherstone K. American Family Physician. 2021.
11. Management of Acute Pain From Non-Low Back Musculoskeletal Injuries: Guidelines From AAFP and ACP. — Arnold MJ. American Family Physician. 2020.
12. Conservative Treatment for Chronic Coccydynia: A 36-Month Prospective Observational Study of 115 Patients. — Charrière S, Maigne JY, Couzi E, et al. European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society. 2021.
13. Coccygodynia: Evaluation and Management. — Fogel GR, Cunningham PY, Esses SI. The Journal of the American Academy of Orthopaedic Surgeons. 2004.
14. A Novel Radiological Classification for Displaced Os Coccyx: The Benditz-König Classification. — König MA, Grifka J, Benditz A. European Spine Journal : Official Publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society. 2022.
15. Clinical Decision Making for the Evaluation and Management of Coccydynia: 2 Case Reports. — Marinko LN, Pecci M. The Journal of Orthopaedic and Sports Physical Therapy. 2014.
16. Durable Medical Equipment Guidelines for Persons with Spinal Cord Injury or Dysfunction (Update 2022). — American Spinal Injury Association. 2022.
17. Coccydynia. — Patel R, Appannagari A, Whang PG. Current Reviews in Musculoskeletal Medicine. 2008.
18. The Interdisciplinary Management of Coccydynia: A Narrative Review. — White WD, Avery M, Jonely H, et al. PM & R : The Journal of Injury, Function, and Rehabilitation. 2022.
19. Surgery for Refractory Coccygodynia: Operative Versus Nonoperative Treatment. — Kleimeyer JP, Wood KB, Lønne G, et al. Spine. 2017.