Why Do I Get Leg Cramps in the Night?

Nocturnal leg cramps--sudden, involuntary muscle contractions--can be very painful and disturb your sleep. According to the Mayoclinic.com, they most often affect the calves. But other leg muscles are susceptible as well. There are several potential causes for night leg cramps.

Dehydration

• Dehydration may cause leg cramps. Ensure that you get at least 64 ounces of water daily to avoid this, and more if you exercise or it is hot outside. If your urine is a pale yellow, you likely do not suffer from dehydration.

Mineral Deficiency

• Low levels of minerals have long been known to lead to nocturnal leg cramps, according to the digitalnaturopath.com. The biggest culprits are deficiencies in magnesium, calcium, potassium and sodium. Eat more low-fat yogurt, spinach, beans, and lentils for potassium and calcium; bananas, bran cereal, brown rice, and almonds for magnesium.

Muscle Exertion

• People with muscular bodies are more prone to leg cramps. And those who work out hard certainly are. According to the Mayoclinic.com, "extreme physical exertion during the day can lead to the depletion of glycogen (fuel for muscle cells) and leave muscles prone to cramping."

Flat Feet

• Flat feet (the absence of arching on the bottom of the foot) can cause leg cramps. Get and wear proper orthotics to rule out this possibility.

Medical Conditions

• Certain medications may cause leg cramps, including ones for asthma, high blood pressure and heart disease. Conditions that may cause cramps include pregnancy, diabetes, Parkinson's Disease, thyroid problems, anemia and hypoglycemia.