The knee joint is one of the largest joints in the human body, and is used in just about every activity we perform in our lower body. The knees are the most easily injured part of the body. The largest and most complicated joint, the knee is used for everything from standing up, sitting, to walking, running, etc. It's a weight-bearing joint that straightens, bends, twists and rotates. All this motion increases your risk of acute or overuse knee injuries.
The knee is a joint that has three compartments. The thigh bone (femur) meets the large shin bone (tibia) forming the main knee joint. This joint has an inner (medial) and an outer (lateral) compartment. The kneecap (patella) joins the femur to form a third compartment, called the patellofemoral joint.
The knee functions to allow movement of the leg and is critical to normal walking. The knee flexes normally to a maximum of 135 degrees and extends to 0 degrees. The bursae, or fluid-filled sacs, serve as gliding surfaces for the tendons to reduce the force of friction as these tendons move. There are different types of knee Injuries like:
Knee injuries can take the form of a sprain or a strain. Sprains result from suddenly stretching or tearing the ligaments that hold the bones together. A strain is an injury to the muscles or the tendons that connect the muscles to the bones. In most cases, either type of injury will take about 6 to 8 weeks to heal.
Acute knee injuries including torn ligaments and torn cartilage are often caused by twisting the knee or falling. Sports that involve running and jumping and sudden stopping and turning, such as soccer, basketball, volleyball, tennis, and baseball, as well as contact sports such as football, wrestling, and hockey increase the risk of an acute knee injury.
Overuse knee injuries (including muscle strain, tendonitis and bursitis) may develop gradually over days or weeks. Pain is often mild and intermittent in the beginning and worsens over time. When muscles and tendons are stressed even slightly beyond their capabilities, microscopic tears occur. (Inflammation, which is part of the healing process, is what causes the pain). These tears must be given a chance to heal before subjected to the same activity to avoid overuse injury. Treat overuse injuries early to prevent chronic problems.
Knee osteoarthritis is a common cause of knee pain. The risk increases with age. Osteoarthritis is a form of arthritis involving degeneration of the cartilage. Exercise is vital to maintain strength and flexibility of muscles supporting the knee, which reduces the stress on the knee joint.
Knee Pain Treatments:
The best way to protect your knee from further damage depends on the type and severity of your injury. For most minor injuries, a compression wrap is usually sufficient. More-serious injuries, such as a torn ACL or high-grade collateral ligament sprain, usually require crutches and sometimes also a brace to help stabilize the joint with weight bearing.
Taking a break from your normal activities reduces repetitive strain on your knee, gives the injury time to heal and helps prevent further damage. A day or two of rest may be all that's needed for minor injuries. More severe damage is likely to need a longer recovery time.
A staple for most acute injuries, ice reduces both pain and inflammation. Some doctors recommend applying ice to your injured knee for about 20 minutes three times a day. A bag of frozen peas works well because it covers your whole knee. You can also use an ice pack wrapped in thin fabric to protect your skin. Although ice therapy is generally safe and effective, don't leave ice on longer than recommended because of the risk of damage to your nerves and skin.
Compression helps prevent fluid buildup (edema) in damaged tissues and maintains knee alignment and stability. Look for a compression bandage that's lightweight, breathable and self-adhesive. It should be tight enough to support your knee without interfering with circulation.
Nonsteroidal anti-inflammatory drugs (NSAIDs), including aspirin, ibuprofen (Advil, Motrin, others) and naproxen (Aleve, Naprosyn), can help relieve pain. But, NSAIDs can have side effects, especially if you take them for long periods or in amounts greater than the recommended dosage.
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