Katie Cameron

Jan 8, 2025 | webmd.com | Debra Fulghum Bruce |Katie Cameron

Did you know that there are more than 100 types of arthritis? Arthritis is a disease that causes damage to the joints in your body. Although the condition is extremely common in people over 50, it's unclear what causes every type of arthritis. Some forms are caused by normal wear and tear with age, while others are triggered by autoimmune conditions, meaning your body's immune system is attacking your joints by mistake. Even certain viruses — including COVID-19 — can cause viral arthritis.