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If you’re in pain, blame your nerves, which send pain signals to your brain. But your nerves also deserve thanks for keeping you safe. They alert you to dangers like extreme heat—or even a bug crawling on your skin.

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A pinched nerve means that something is putting pressure on a nerve, causing pain, numbness, or loss of function. Pinched nerves can occur anywhere in your body from your back to your legs to your wrists.

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Losing muscle mass is normal when getting older, but abnormal muscle loss can be caused by malnutrition, an eating disorder, or an immune disease like HIV/AIDs. It can also be a sign of a chronic disease.

Find out how to treat your dehydration

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Find out how to treat your motion sickness

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Find out how to treat benign paroxysmal positional vertigo

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Nerve damage can be caused by many types of injuries, ranging from a bruise to trauma from a car accident. While symptoms of mild nerve damage may go away on their own, severe cases need to be treated by your doctor or a surgeon.

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Peroneal nerve injury is a progressive injury that affects the peroneal nerve, a nerve running along the side of your leg. It can be injured in an accident or a knee dislocation, but can also from wearing high heels.

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Understand your involuntary movements symptoms, including 7 causes and common questions.

Mitochondrial myopathies are a group of neuromuscular diseases caused by damage to the mitochondria. Symptoms include exercise intolerance and muscle weakness.

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ALS is a condition that affects nerve cells, leading to eventual loss of control over muscle function. Symptoms include muscle twitches, cramps or weakness.

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