1 - Osteoarthritis is the most common type of arthritis.it is also referred to as wear-and-tear arthritis and degenerative arthritis.
2-Weightbearing joints, such as knees, hips, and the spine are most commonly affected, though OA can also affect fingers or any joint with prior traumatic injury, infection, or inflammation.
3- Most OA patients have increased joint pain during activity, which is relieved with rest.
4-Overall, more women than men develop osteoarthritis. Interestingly, men under age 55 are more likely to have osteoarthritis than women under 55 years old.
5-Risk factors associated with osteoarthritis include:

• age
• obesity
• injury or overuse of joint
• heredity/family history
• muscle weakness

6-An internist or rheumatologist can diagnose osteoarthritis. The doctor will order x-rays or an MRI to look for evidence of joint damage consistent with osteoarthritis.
7-There has never been a better time than right now to make lifestyle modifications which may prevent osteoarthritis or help you manage the disease if you do develop it.
8-Don't wait to begin a regular regimen of moderate exercise or to lose excess weight.
9-Consult with your doctor and understand your options.
Good luck.