Hi Rob. It’s not uncommon for people to have pain years after an injury. Often the cumulative years of wear and tear over a joint can lead to pain later in life. Sometimes people with osteoarthritis, caused by the breakdown of cartilage of the joints, are very sensitive to changes in humidity and temperature. They are often better predictors of rainy weather than the local forecast! There are a variety of treatment options available to patients with occasional knee pain caused by osteoarthritis. Unfortunately, pain is highly individualized and what is effective in one person may not be as effective for another. Some people only need to take occasional anti-inflammatory medications such as ibuprofen to control their pain. Others may find that the nutritional supplements glucosamine and chondroitin help to reduce their pain and joint stiffness. Knee injections containing cortisone (which decreases inflammation in the joint) or hyaluronic acid (a gel that lubricates and cushions the joint) can also help with knee pain. Furthermore, lifestyle changes such as weight loss and home exercises that focus on strengthening the quadricep muscles can lead to significant pain relief. Once again, the important take-home point is that everyone experiences pain differently and the best option is to speak with your doctor about an individualized plan that best suits your pain, individual goals, and lifestyle.