You can get relief from this condition by using warm packs, but if that doesn't help, see your doctor. (verywell.com)
Some people put warm packs at the base of the tail to ease discomfort, but it is not medically proven to have any effect to this day. (second-opinion-doc.com)
For nursing moms, you can also try warm packs, often baby diapers filled with hot as you can stand it water fit perfectly. (verywellfamily.com)