Assertion: coccyx's surface | /r/HasProperty | microtrauma
Facets:
Source sentences:
text: Nontraumatic coccydynia can occur due to prolonged or repetitive sitting on a hard surface (microtrauma), hypomobility or hypermobility of the coccyx (basically, the tailbone isn’t moving properly), degenerative joint or disc disease, and other variations in the structure of the coccyx.