Other Causes of buttock pain:
o Lumbar Spinal Stenosis
o Retroperitoneal Hematoma
o Retroperitoneal Tumor
o Perirectal Abscess
o Cancer (e.g. bone cancer, multiple myeloma)
o Bursitis:
Bursa is a small serous sac between a tendon and a bone.Bursitis means inflammation of the bursa(as of the shoulder or elbow). (Weaver's Bottom)
o Arthritis of Sacroiliac Joint (Spondyloarthropathies, Such as Ankylosing Spondylitis, Reactive Arthritis, Psoriatic Arthritis)
o Infectious Arthritis of Sacroiliac Joint (Brucellosis, Staphylococcus Infection)
o Polymyalgia Rheumatica:
A disorder of the elderly marked by muscular pain and stiffness in the shoulders,neck and in the pelvic area.
o Paget's Disease of the bone:
A chronic bone disease marked by enlargement and rarefaction and bowing of the long bones and deformation of the flat bones;called also Osteitis Deformans, Osteodystrophia Deformans.