Knee problems are generally found in two categories: inflammatory and mechanical. Mechanical knee problems are those that usually result from some sort of injury, whether through playing sports and making a sudden bad movement or suffering direct trauma to the knee. Inflammatory problems are the result of either tendon problems or rheumatic diseases. There is a third category, in which direct bone problems result from more serious diseases, such as cancer.
Knee Injury
Knee injuries are the most common form of knee problem. They can result from sports, running or any form of direct blow to the knee joint. These injuries could range from dislocations of the patella to cracked kneecaps, sprains or tendon injuries. Such injuries usually occur quickly, but they may also result from repeated activities that put strain on the knee, such as running.
Knee Tendinitis
Tendinitis in an inflammatory knee problem that can result from activities that involve a great deal of stress on the knee, such as running and dancing. Tendinitis is particularly common among those who are not in the best of shape, though this is not always the case.
Chondromalacia
Chondromalacia is a condition in which the cartilage inside the knee cap begins to soften, which can result in knee pain even during mild activities such as walking down a flight of stairs or walking down a hill. Though the condition can develop in older people, it is more common among those in their late teens and early twenties.
Osgood-Schlatter
Osgood-Schlatter disease is a common affliction, especially among young athletes. Boys are particularly susceptible to the disease during their growth spurt. Though not particularly serious, it can cause some swelling and knee tenderness, even when not performing sports or activities. It can occur in one knee or both.
Osteosarcoma
Of all knee problems, this is the most serious. Osteosarcoma is a common form of bone cancer, and it shows up in the knee area more often than not. The cells that make up this form of cancer create bone matrix. The knees are not the only area that can be afflicted by osteosarcoma, but it usually manifests itself at the ends of long bones in the body.
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