Hidden intermittent pain in the coccyx may be caused by coccygeal bursitis, trauma and other reasons. 1. Tailbone bursitis: the bursa is in the tip of the tailbone is also the anal position of the soft tissues, due to long-term sedentary, seat hard inappropriate, overweight compression or long-term cycling movement will make the bursa part of the repeated friction, which will cause aseptic inflammation of the local bursa, resulting in pain in the coccyx, the stimulation or extrusion of the pain is more pronounced. 2. Trauma: If trauma leads to fracture of the coccyx, the surrounding ligaments and tendons will be damaged, and the coccyx will have intermittent pain, or the buttocks land on the ground when falling, or the sacrococcygeal area is impacted, which will lead to injury of the sacrococcygeal fascia or injury of the sacrococcygeal area, and the coccygeal area will have intermittent pain. Hidden intermittent pain in the tailbone may also be caused by other reasons, it is recommended to consult a doctor in time and standardize the treatment to avoid delaying the condition.