3.Rheumatoid Arthritis
Rheumatoid arthritis is a chronic illness in which the body’s immune system mistakenly attacks the joints, causing pain and swelling. While osteoarthritis can strike just one knee, rheumatoid arthritis tends to happen on both sides of the body. It can also affect the hands, wrists, and feet. RA can also cause other symptoms too, like fever and fatigue.
4.Post-Injury Arthritis
In some cases, osteoartritis starts after an injury, like breaking a knee bone or tearing one of the ligaments. The arthritis might not happen right away. Damaged bones or ligaments can lead to damaged cartilage over time, causing pain and stiffness later on.
