Sacroiliac joint (SIJ) pain is an important cause of lower back problems. 
Multiple SIJ injection techniques have been proposed over the years to help in 
the diagnosis and treatment of this condition. However, the SIJ innervation is 
complex and variable, and truly intra-articular injections are sometimes 
difficult to obtain. Different sacroiliac joint injections have shown to provide 
pain relief in patients suffering this ailment. Various techniques for 
intraarticular injections, sacral branch blocks and radiofrequency ablation, 
both fluoroscopy guided and ultrasound guided are discussed in this paper. Less 
common techniques like prolotherapy, platelet rich plasma injections and 
botulism toxin injections are also discussed.