General
Arthritis is a condition describing inflammation of a joint, and applies to over 100 diseases that have been identified to date. Most of these diseases fall into one of two categories: degenerative arthritis, such as osteoarthritis, or inflammatory arthritis, such as rheumatoid arthritis. Symptoms of most types of arthritis include pain, stiffness, and swelling in the joint.
Explore the topics below for peer reviewed articles that explain how arthritis causes joint pain as well as the differences between degenerative and inflammatory arthritis.
The sacroiliac joints, or SI joints, are susceptible to inflammation, called sacroiliitis, which may also be a symptom of other inflammatory arthritic conditions. Learn which types of arthritis can affect the SI joints.
Types of Arthritis
Over 100 types of arthritis affect 46 million adults in the United States. Most types of arthritis are classified into one of two groups: degenerative arthritis or inflammatory arthritis.
Understanding Joint Pain
This article describes 12 conditions that can cause knee swelling. Doctors may refer to knee swelling as “knee effusion,” and others may call it “water on the knee.”
What Is Crepitus?
Crepitus is the medical term for cracking or popping sounds in a joint such as the knee. Learn about crepitus pain symptoms and treatment in this article.