Common Causes of Knee Pain

Do your knees feel sore or stiff? Maybe you notice discomfort when climbing stairs, standing up after sitting, or trying to stay active. Knee pain is a common issue that can interfere with everyday movement and quality of life. Because the knee is a complex joint that supports much of the body’s weight, it is vulnerable to several different conditions. Understanding the type of pain you’re experiencing and what may be causing it is an important first step toward proper care.

Understanding Knee Pain

Knee pain generally falls into two categories: acute and chronic. Acute pain develops suddenly and is often sharp or intense. It is usually linked to a specific injury or strain and may last anywhere from a few days to several months. In many cases, acute pain improves as the injured tissue heals.

Chronic knee pain, on the other hand, persists for more than three to six months and may continue even after the original injury has healed. This type of pain can be constant or come and go over time. It is often described as aching, deep, burning, or dull, and may radiate into the lower leg or thigh. Chronic pain may have a clear cause or develop without a noticeable injury.

Common Causes of Knee Pain

Injury is one of the most frequent reasons people experience knee pain. A sudden fall, sports-related impact, or awkward twisting motion can damage ligaments, tendons, cartilage, or other soft tissues in the knee. These injuries often lead to swelling, stiffness, instability, and difficulty moving the joint.

Degenerative changes are another major source of knee discomfort. Over time, normal wear and tear can cause the cartilage that cushions the knee joint to break down. As this protective tissue thins, movement may become painful and the joint may feel stiff or weak, especially during activity.

Arthritis is also a leading cause of knee pain. Arthritis refers to inflammation within the joint, which can result from aging, joint deformities, previous injuries, or underlying conditions. Inflammation can cause pain, swelling, reduced range of motion, and a sensation of grinding or stiffness within the knee.

Because knee pain can stem from several different causes, treatment depends on the underlying condition and how advanced it is. Identifying the source of the pain is key to finding an approach that helps reduce discomfort and restore mobility.