Joint effusion a resultant large effusion due to inflammation. Gout is usually present with recurrent attacks of acute inflammatory arthritis (red, tender, hot, swollen joint). It is caused by elevated levels of uric acid in the blood that crystallizes and deposits in joints, tendons, and surrounding tissues. Gout affects 1% of individuals in Western populations at some point in their lives. Trauma from ligamentous, osseous or meniscal injuries can result in an effusion. These are often hemarthrosis or bloody effusions. Rest Joint effusion A joint effusion is the presence of increased intra-articular fluid. It may affect any joint. Commonly it involves the
Septic arthritis 1.1% of getting infected in knee joint, and 0.3 to 1.7% of getting infected in hip joint. There are three phases of artificial joint infection: early, delayed, and late. Septic arthritis is most commonly caused by bacteria reaching the synovial membrane of a joint. Bacteria can enter the joint by: Micro-organisms in the blood may come from infections elsewhere in the body such as wound infections, urinary tract infections, meningitis , or endocarditis. Sometimes the infection comes from an unknown location. Joints with preexisting arthritis, such as rheumatoid arthritis, are especially prone to bacterial arthritis spread through the blood. In