What is knee pain?
Knee pain is a common problem that can originate in any of the bony structures compromising the knee joint (femur, tibia, fibula), the kneecap (patella), or the ligaments and cartilage (meniscus) of the knee. Knee pain can be aggravated by exercise, affected by the surrounding muscles and their movements, and be triggered by other problems (such as a foot injury). Knee pain can affect people of all ages, and home remedies can be helpful unless it becomes severe.
What are knee pain symptoms and signs?
The location of the knee pain can vary depending on which structure is involved. With infection or an inflammatory process, the whole knee might be swollen and painful, while a torn meniscus or fractureof a bone gives symptoms only in one specific location. A Baker cyst will usually cause pain in the back of the knee.
The severity of the joint pain can vary, from a minor ache to a severe and disabling pain.
Some of the other signs and symptoms that accompany knee pain are
- difficulty walking due to instability of the knee,
- limping due to discomfort,
- difficulty walking up or down steps due to ligament damage,
- locking of the knee (unable to bend the knee),
- redness and swelling,
- inability to extend the knee, and
- shifting weight to the opposite knee and foot.
What causes knee pain?
Knee pain can be divided into three major categories:
- Acute injury: such as a broken bone, torn ligament, or meniscal tear
- Medical conditions: arthritis, infections
- Chronic use/overuse conditions: osteoarthritis, patellar syndromes, tendinitis, and bursitis
Below is a list of some of the more common causes of knee pain. This is not an all-inclusive list but rather highlights a few common causes of knee pain in each of the above categories.
What are risk factors for knee pain?
Biomechanics: The knee joint is complicated in its operation and is used frequently throughout the day. Any change in the movement of the joint (leg-length difference, change in walking style due to back problems) can cause subtle changes and cause pain and injuries.
Excess weight: The stress on the knee joint is increased with excess weight. Obesity also increases the risk of osteoarthritis as the cartilage breaks down more rapidly.
Overuse during repetitive motions as are found during certain exercises (jogging, skiing) or work conditions (long periods of kneeling) can cause breakdown of cartilage and lead to pain.