Coccydynia Pain and The Sacrococcygeal Joint – Tailbone Pain

What is the Sacrococcygeal Joint that is involved with Coccydynia Pain?

The sacrococcygeal joint is the joint in the tailbone formed between the sacrum and the coccyx. The coccyx is a small triangular shaped bone made up of 3-5 fused segments. Many ligaments attach to the coccyx helping to provide stability and support for the pelvis, its muscles and contents. 

back view of the pelvis showing sacrococcygeal joint source of Coccydynia

Pain related to the Sacrococcygeal Joint – Coccydynia Pain

Pain relating to the coccyx and sacrococcygeal joint is known as coccydynia (pronounced cox-y-dynia). A sudden onset of coccygeal pain is usually associated with trauma, externally such as from a fall backwards onto the bone, or internally such as in childbirth. Onset can also be gradual, commonly related to sustained pressure from sitting or local muscle forces.  

Factors associated with an increased risk of developing coccydynia pain are: 

  • being overweight 
  • being female – women are 5 times more likely to develop the condition  
  • increased flexibility or mobility of the joint (hypermobility) 
  • reduced flexibility or stiffness of the joint (hypomobility) 
  • variants of coccyx shape 
  • pelvic floor muscle weakness or overactivity 
  • other general health factors (read more here): These must be ruled out. 

Need Help? How Can A Hip Pain Professional Help?

Your Hip Pain Professional can reduce pain associated with coccydynia by ddressing factors such as: 

  • excessive weightbearing on the coccyx due to seating or habitual sitting postures (read more here)
  • weakness, spasm or altered activity in the muscles that attach to the coccyx including the gluteus maximus (buttock) and pelvic floor muscles (see the soft tissue section) 
  • altered stress and strain on the structures that attach to the coccyx which may have occurred after trauma or as a gradual build up over time 
  • Providing or referring you for a pain-relieving injection into the area or in very rare cases, to a surgeon. 

Search For A Hip Pain Professional Here.


This blog was written by Dr. Alison Grimaldi, with contribution from one of our Hip Pain Professionals, Kirsty McNab, experienced physiotherapist.

Dr. Alison Grimaldi is a globally recognised expert physiotherapist, researcher, and educator, who has over 30 years professional clinical experience helping patients recover from a wide range of hip and pelvic conditions.

Dr Alison Grimaldi - Hip Pain Professional

Dr. Alison Grimaldi  BPhty, MPhty(Sports), PhD, FACP 

Dr Grimaldi has completed Bachelor of Physiotherapy, Master of Physiotherapy and  Doctor of Philosophy (Physiotherapy) degrees. She is a fellow of the Australian College of Physiotherapists, Practice Principal of PhysioTec Physiotherapy, an Australian Sports Physiotherapist , an Adjunct Senior Research Fellow at the University of Queensland, as well as an author and global educator. Her passion is helping people with hip pain, and educating other health professionals around how to help more people with hip pain.

Check Out More You Can Read on this Area at HipPainHelp:

  1. Pain Locator Map visit here to learn more about back or peripheral nerve related pain in different regions around the hip and pelvis.

  2. Coccyx Cushion – Tailbone Relief Sitting This is an ideal option to help with pain relief if you suffer from coccydynia – learn more.

  3. Egg Carton Mattress Topper – Pain Relief Sleeping If you are struggling to sleep due to your tail bone pain you need to read this

  4. Saddle Region Pain.  Saddle pain is pain that is experienced in the region between the hips that would contact a saddle when riding a horse or bicycle. Read more about the issues that may exist in this area.


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