Tailbone Disorders Summary The tailbone is the small bone at the bottom of your backbone, or spine. Tailbone disorders include tailbone injuries, pain, infections, cysts and tumors. You rarely break your tailbone. Instead, most injuries cause bruises or pulled ligaments. A backward fall onto a hard surface, such as slipping on ice, is the most common cause of such injuries. Symptoms of various tailbone disorders include pain in the tailbone area, pain upon sitting, pain or numbness in the arms or legs due to pressure on nerves in the tailbone area, and a mass or growth you can see or feel. National Institute of Arthritis and Musculoskeletal and Skin Diseases Find an Expert American Society of Colon and Rectal Surgeons American Society of Colon and Rectal Surgeons National Institute of Arthritis and Musculoskeletal and Skin Diseases National Institute of Arthritis and Musculoskeletal and Skin Diseases Diagnosis and Tests Bone X-Ray (Radiography) Array Computed Tomography (CT) – Spine Array Magnetic Resonance Imaging (MRI) – Spine Array Clinical Trials ClinicalTrials.gov: Pilonidal Sinus National Institutes of Health Health Check Tools Coccygeal Injury DSHI Systems Coccygeal Pain DSHI Systems Specifics Levator Syndrome Merck & Co., Inc. Pilonidal Cyst Mayo Foundation for Medical Education and Research Pilonidal Disease American Society of Colon and Rectal Surgeons Sacral Dimple Mayo Foundation for Medical Education and Research Tarlov Cysts National Institute of Neurological Disorders and Stroke Array Pilonidal cyst resection Pilonidal dimple Tailbone trauma Tailbone trauma – aftercare Journal Articles Tailbone Disorders Start Here Tailbone Pain: How Can I Relieve It? Mayo Foundation for Medical Education and Research