a man sits indoors and holds his knee with his hand, which hurts from injury or age-related degenerative processes. the area of

knee pain leg ache arthritis symptom rheumatism injury sport health disease joint cramp sprain hurt sore man accident athlete strain tendon medical therapy inflammation osteoarthritis suffer problem bone medicine ligament painfully massage sick chronic runner stretching unhappy holding trauma gout diagnosis rehabilitation discomfort wellness patient disabled diagnostic illustration sitting sits indoors holds his hand which hurts from age-related degenerative processes area focus highlighted red for advertising processes red advertising