The pain on the left side of the tailbone may be caused by the following reasons: 1. The patient’s tailbone is traumatized, resulting in damage to the local soft tissues, which causes pain due to trauma. 2. The patient may be sitting for a long time, maintaining the same posture, resulting in excessive pressure on the tailbone, which affects the blood circulation in the area and causes pain. 3. The painful phenomenon of the left side of the tailbone may occur due to local nerve compression and damage to the nerve at the tailbone. 4, the patient may not pay attention to warmth, resulting in wind and cold at the tailbone, and the painful phenomenon occurs under the influence of wind and cold. After the phenomenon of tailbone pain, it is recommended that the patient rest in bed and pay attention to warmth, and in serious cases, it is best to go to the hospital for a film examination, and then cooperate with the doctor to get rid of the pain caused by the disease.