Arthritis does not occur in the thigh, as this area does not have a joint, which is where arthritis occurs, explains WebMD. However, arthritis that occurs in the hip or knee is treated with exercise, medications, hot and cold compresses, joint protection and surgery if needed.
Arthritis literally means joint inflammation, according to WebMD. Inflammation is a natural reaction to injury or disease that causes stiffness, pain and swelling. Three common types of arthritis are rheumatoid arthritis, osteoarthritis and gout. Rheumatoid arthritis causes the body's own immune system to attack the lining in the joints. This can affect any area of the body, excluding the lower back. Osteoarthritis causes the cartilage that rests between the bones to wear down over time, causing bones to rub against one another. Gout occurs when the body cannot eliminate uric acid, which often affects the big toe, wrists and knee joints.
Arthritis is not preventable, but certain actions and practices do reduce a person's risk of developing this condition, states WebMD. Eating a healthy diet helps protect the body's bones and muscles; maintaining a healthy weight helps keep excess stress off joints; and exercise helps maintain flexibility. Diagnosing arthritis as early as possible can often reduce the degree of damage to the joints, particularly rheumatoid arthritis.