Arthritis is a condition involving damage to the joints of the body. This can cause inflammation and stiffness in the joints. There are 2 types of arthritis. Osteoarthritis and rheumatoid (room-a-toyed). The cartilage is a substance for the bones to not grind against each other. Once the cartilage wears away there is a high chance of getting arthritis. There are multiple reasons for the cause of arthritis. Too much sport knee injuries, if you are not flexible enough, if you have fractures/infections or if your overweight. FUN FACT: The term 'ARTHRITIS' refers to about 120 different diseases that can affect the joints, muscles and soft tissue