There's osteoarthritis. And rheumatoid arthritis. And infectious arthritis, childhood arthritis, Still's disease, lupus, Sjogren's disease and many more. In total, there are more than 100 kinds of arthritis.

People typically think knee replacement surgery is only for older adults with arthritis. But the surgery is also used for young patients when joint damage has become severe.

Arthritis symptoms can get in the way of many social activities, which can affect quality of life. So researchers wanted to know which aspects of arthritis most affected social life.

If you're in pain, you probably don't feel great. If you're emotionally frustrated or upset, it can make your pain worse. So then how do you break the cycle?

When arthritis causes permanent joint damage, many patients turn to joint replacement surgery. While hip and knee replacement surgeries can lead to huge improvements, they still carry serious risks.

Inflammation is the reason patients with rheumatoid arthritis develop swollen and painful joints. But inflammation is not unique to rheumatoid arthritis; it is also behind other painful joint conditions.

Drugs are one way to treat arthritis but they aren't the only way. Many arthritis patients choose to add natural therapies to their treatment plan.

Knees are only meant to bend forward and backward. If a knee pops and locks up with major pain, something serious is going on there, and it's most likely an ACL injury.

If your knee hurts, exercise might not be on the top of your list of things to do. Nevertheless, staying physically active is a key part of managing knee pain.

Some drugs used to relieve the pain of arthritis can do damage to your digestive tract. This is why many arthritis patients take other medications to protect their digestive system.