Septic Arthritis of the Temporomandibular Joint (TMJ) is a rare but serious condition characterized by the presence of a bacterial infection within the joint. The infection can occur due to direct trauma to the joint, such as from an injury or surgery, or as a result of bacterial spread from nearby structures like dental infections or sinusitis. The bacteria cause inflammation and damage to the joint, leading to symptoms such as severe pain, swelling, redness, warmth, and difficulty in opening and closing the mouth. If left untreated, septic arthritis of the TMJ can result in permanent joint damage and functional impairment.