Other causes of the inflammation can be infectious. Septic arthritis is caused by a bacterial or fungal infection. Lyme disease or Ehrlichia infection can also cause arthritis. Auto-immune diseases, or what is now called immune- mediated diseases, such as Lupus can cause swollen, painful, inflamed joints. More rarely, tumors can cause arthritis.
Treatment for arthritis should be directed to the inciting cause if possible. Surgery may be needed to stabilize a joint. DJD may be treated with NSAID’s, pain medication such as Tramadol, cartilage protective agents such as glucosamine or Adequan, acupuncture, or as a last resort, steroids. NSAID’s (non-steroidal anti-inflammatory drugs) have many types. In general, it is recommended to use NSAID’s developed for pets, and not ones made for use in people as those are highly likely to cause ulcers in dogs, and most NSAID’s can’t be used in cats.