Septic arthritis is also known as infectious arthritis. The bacterial infection causes it. However it may also be caused by a viral or a fungal infection. The spread of infection can take place to the affected joints from other parts of the body. It can also be introduced to other joints during surgery or an injury.  This condition is very acute and it results very quickly in inflammation, severe joint pains, redness and swelling.  In some cases chills and fever are also caused. At such times, the condition becomes very chronic.

Any joint can be affected by septic arthritis. However, very commonly it can be found in the hip, shoulder, knee, finger joints, elbow and wrist.  Mostly, it affects only one joint. However, sometimes more than one joint can also be affected. The diagnosis and treatment of this condition has to be done very properly and quickly. Otherwise, other joints can be destroyed in a short period of time.

Septic arthritis is very commonly found in people who have experienced a recent traumatic injury to joints.  It also occurs in people who have undergone joint replacement or have had a joint surgery.  People who have developed an infection in the blood are also likely to develop septic arthritis.  The spread of microorganisms can be seen from the original site of infection in blood to the joint space.

Additional risk factors for septic arthritis include diabetes, age, weakened immune system etc.  Other conditions also include rheumatoid arthritis and gout.  Acute forms of septic arthritis also include streptococcus, staphylococcus etc.

Sometimes HIV, Lyme disease, mumps, rubella or Hepatitis B can also be caused by the microorganisms. These move in for infecting the joint. Chronic septic arthritis is very rare and is caused by microorganisms.  Proper care must be taken for septic arthritis.