What is the cause of pain in the anus below the tailbone?

The pain between the caudal vertebra and the anal circumference is caused by local and systemic causes. Local causes include:

1. Fracture caused by caudal vertebra trauma, local soft tissue injury, etc.;

2. Chronic strain, such as anal tail ligament inflammation;

3. Perianal diseases, such as perianal infection, perianal abscess, anal fistula, anal fissure, advanced rectal cancer invading anal tail ligament and nerve, etc. Systemic causes include ankylosing spondylitis, autoimmune diseases, disc herniation, polyneuritis, etc. In this case, it is recommended to go to the corresponding specialty for treatment, after a clear diagnosis, symptomatic treatment.