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Symptoms J-L are usually a result of your immune system's natural defenses against irritants and disease, but some symptoms can be a sign of a serious medical condition. If you are experiencing joint pain, knee pain or lower back pain, check the Symptom Dictionary to learn what your symptoms mean and how to manage them.

Featured Article:  Joint Pain

Learn about the causes of Joint Pain and treatments for Joint Pain in the Symptoms Dictionary at HowStuffWorks. See more »

Joint Pain

Joint Pain

Learn about the causes of Joint Pain and treatments for Joint Pain in the Symptoms Dictionary at HowStuffWorks.

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Jaundice (Yellow Skin)

Learn about the causes of Jaundice (Yellow Skin) and treatments for Jaundice (Yellow Skin) in the Symptoms Dictionary at HowStuffWorks.

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Joint Swelling

Learn about the causes of Joint Swelling and treatments for Joint Swelling in the Symptoms Dictionary at HowStuffWorks.

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Knee Pain

Learn about the causes of Knee Pain and treatments for Knee Pain in the Symptoms Dictionary at HowStuffWorks.

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Leg Pain

Learn about the causes of Leg Pain and treatments for Leg Pain in the Symptoms Dictionary at HowStuffWorks.

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Lichenified

Learn about the causes of Lichenified and treatments for Lichenified in the Symptoms Dictionary at HowStuffWorks.

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Limited Range Of Motion

Learn about the causes of Limited Range Of Motion and treatments for Limited Range Of Motion in the Symptoms Dictionary at HowStuffWorks.

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Lordosis

Learn about the causes of Lordosis and treatments for Lordosis in the Symptoms Dictionary at HowStuffWorks.

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Low Nasal Bridge

Learn about the causes of Low Nasal Bridge and treatments for Low Nasal Bridge in the Symptoms Dictionary at HowStuffWorks.

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Lower Back Pain

Learn about the causes of Lower Back Pain and treatments for Lower Back Pain in the Symptoms Dictionary at HowStuffWorks.

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