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Definition
By Mayo Clinic staffIf you're suffering from knee pain, you're not alone. Almost one in three Americans older than age 45 reports some type of knee pain, and it's a common reason that people visit their doctors or the emergency room.
Knee pain may be the result of an injury, such as a ruptured ligament or torn cartilage. Or, certain medical conditions, including arthritis, gout and infection, may be at the root of your knee pain.
Many relatively minor instances of knee pain respond well to self-care measures. More-serious injuries, such as a ruptured ligament or tendon, may require surgical repair.
Although every knee problem can't be prevented — especially if you're active — you can take certain steps to reduce the risk of injury or disease.
