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Is there any way to prevent painful leg cramps in the middle of the night?

Cramping during sleep is usually due to an exaggeration of a normal muscle reflex. When you turn during sleep, you contract your calf muscles and stretch their tendons. This stimulates nerve stretch receptors in the tendon and sends a message back to the spinal cord, telling the calf muscles to contract. Sometimes, the muscles remain contracted and hurt. Painful muscle cramps at night can also be caused by nerve damage such as that caused by pinching a nerve, muscle damage, a partially-obstructed flow of blood to the legs or abnormal mineral or hormone levels. If you have this problem often, check with your doctor. If you do not have a serious cause, you can often prevent night cramps by exhausting the stretch reflex before you go to bed by stretching your calf muscles with wall pushups, and applying a heating pad for 10 minutes before you go to sleep. The most common cause of leg cramps in exercisers is lack of salt.

The Food and Drug Administration has ruled that none of the over-the-counter drugs used to treat night-time leg cramps are recognized as safe or effective. The only drug that has been shown to be effective in treating night-time leg cramps is quinine. Doctors often prescribe 1 or 2 quinine pills at bedtime, but they can cause birth defects and miscarriages, so they should never be taken by a woman who may become pregnant. They can also cause ringing in the ears, headache, nausea, disturbed vision, chest pain and asthma.

March 25, 2006

May 30th, 2013
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About the Author: Gabe Mirkin, MD

Sports medicine doctor, fitness guru and long-time radio host Gabe Mirkin, M.D., brings you news and tips for your healthful lifestyle. A practicing physician for more than 50 years and a radio talk show host for 25 years, Dr. Mirkin is a graduate of Harvard University and Baylor University College of Medicine. He is board-certified in four specialties: Sports Medicine, Allergy and Immunology, Pediatrics and Pediatric Immunology. The Dr. Mirkin Show, his call-in show on fitness and health, was syndicated in more than 120 cities. Read More
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