The largest joint in your body is the knee. It is a complicated joint consisting of ligaments, bone, and cartilage. The knee cartilage serves as a gliding surface and a cushion. The cartilage in the joint prevents the bones from rubbing against one another when it is healthy. However, when arthritis affects a joint, the bones rub against one another and hurt. The cartilage can deteriorate due to trauma, ageing, and degenerative disorders including arthritis.
Osteoarthritis: Arthritis is a long-term disease that results in inflammation of the joints. Redness, warmth, swelling, tenderness, and discomfort are among the symptoms.

Knee osteoarthritis, sometimes known as "wear and tear" arthritis, can affect up to 40% of people. This is the slow degeneration of the knee cartilage. Osteoarthritis, which is also known as degenerative joint disease, often develops over years and is frequently observed in people who have experienced a knee infection or injury and those who are overweight.