Hello, Welcome to HCM, Many different types of arthritis may cause swelling, redness or warmth around the joint, swelling can cause pain or stiffness. An infection in the joint can cause swelling, pain, and fever. Most common cause of joint swelling are Gout,Osteoarthritis,Pseudogout, Psoriatic arthritis and Rheumatoid arthritis. Osteoarthritis is the most common form of joint disease, sparing no age, race, or geographic area. At the home you can apply ice packs to reduce pain and swelling.Raise the swollen joint so that it is higher than your heart, if possible. you should consult your doctor he will obtain your medical history and will perform a physical examination. The joint will be closely examined. He will decide the cause and treat appropriately. Thank you.