What are the common causes of leg weakness?

There are a variety of reasons why a person may experience leg weakness. When a person has leg weakness, he may feel numb, have trouble walking, and often lose his balance when trying to walk. In some mild cases, it can be caused by a person sitting on their legs in an awkward position for an extended period of time. Some of the other common causes of leg weakness are migraines, Graves' disease, multiple sclerosis, and back injuries.

Migraines are classified as recurring headaches that can last a couple of hours or several days. One of the signs of an impending migraine is numbness or weakness in the legs. The leg weakness may last for a short period of time, or it may last for the duration of the migraine. There are several factors, such as food or stress, that can trigger a migraine. It is not known why migraines affect some people more severely than others.

Graves' disease is another common cause of leg weakness. This disease is an autoimmune system disorder in which the body produces too much thyroid hormone. The overproduction of thyroid hormone can often cause weakness in the large muscles of the legs. Other symptoms of Graves' disease are weight loss, sweating, and insomnia. After this disease has been diagnosed, it can be treated with a prescription antithyroid medication to bring the thyroid hormone back to normal levels.

Another common cause of leg weakness is multiple sclerosis (MS). This disease, which is also an autoimmune disease, affects the brain and nervous system because the body's immune system attacks these systems. The nervous system is under attack, so people with MS often experience numbness and weakness in the legs and have difficulty walking as the disease progresses. There is no known cure for MS, but medications can be used to slow the progression of the disease.

A back injury, which can cause damage to the sciatic nerve, can also cause leg weakness. Many of the nerves in the back are connected to the nerves in the legs, and this is what makes the legs weak. In cases of severe back injuries, surgery and physical therapy may be needed to restore the strength of the back and leg muscles.

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