The tingling and numbness that come with legs falling asleep are an annoyance that nearly everyone has experienced. While this condition is often caused by environmental conditions, such as frostbite, a number of medical conditions can also be to blame. One of the most common causes for legs falling asleep is an increase in the amount of pressure placed on the nerves and veins of the body. It can also be caused by decreases in blood flow to the legs. Patients who experience an increase in the occurrence of this condition may want to talk with their physicians. In some cases, medications or surgery may be required for complete treatment.
Individuals who often notice their legs falling asleep may be suffering from increased amounts of pressure on the veins and nerves of the body. Enlarged blood vessels or a herniated disc can put pressure on the nerves, causing the legs to fall asleep. In some cases, scar tissue and certain infections can also increase pressure on certain veins in the body. These conditions can lead to numbness, tingling, and a feeling that the legs are falling asleep. In these situations, surgery and physical and occupational therapy are often required to ensure complete treatment.
A decrease in blood supply can also lead to legs falling asleep. This decrease in blood supply is typically caused by high amounts of plaque or cholesterol in the veins, known as atherosclerosis, and occurs most often in diabetics. In contrast, a relatively minor cause of decreased blood flow to the legs is frostbite. In most cases, once the underlying cause of the decreased blood supply is treated, the legs of the affected individual will be much less likely to fall asleep.
Individuals who sit with one leg crossed over the other may experience some tingling or numbness in the bottom leg. This is due to decreases in blood supply. Often, once the upper leg is removed, sensation returns. Walking or "shaking out" the affected leg can also help to restore blood flow. Sitting on a hard floor, or lying in the same position for an extended period of time can also cause one's legs to fall asleep.
Other medical condition, such as multiple sclerosis, stroke, or seizures can also result in the legs falling asleep. Radiation therapy and diets that are deficient in calcium, sodium, and potassium can also be to blame. Patients who believe they have vitamin and mineral deficiencies may want to consider using a dietary supplement. They may also want to consult with a physician or registered dietitian.
