The main cause of arthritis pain is the joints rubbing against each other because of the breakdown of the cartilage between them, Mayo Clinic explains. Other symptoms are stiffness and tenderness. The joint is not as flexible as it once was, and the area may also develop bone spurs.
The risk of osteoarthritis increases over time, so older people are more at risk from developing the condition, according to Mayo Clinic. Women and obese people are also more at risk, as are people who suffered joint injuries. People who have jobs that put repetitive stress on a joint are also at higher risk, as are people who have a genetic disposition toward getting arthritis.