An abscess is collection of pus(dead tissue+WBC+bacteria) that has built in within tissue of body, intramuscular injection in gluteal region is a common site for drug delivery so there is very  high chances of abscess formation in this area, it has become more relevant now a days because of Diabetes mellitus, his life style disease is on increasing trend D rug abuse HIV Immuno suppressive diseases  Drugs, irritating to muscles, more common with choloquine and steroid Infection reached in gluteal region either through needle from skin or hematogenous because injury from needle to fat and muscles, most of time it is styphlococcus aureus, chances are always high with boiled syringe than autoclaved or disposable. Causes for gluteal abscess formation Subcutaneous fat in gluteal region is 3.5 cm thick and most of time drug delivered at depth of 3cm so injections are intralipomatous instead of…