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What Are the Causes of Cramps in Feet?

by
author image Kathryn Meininger
Kathryn Meininger began writing and publishing poetry in 1967. She was co-founder and editor of the professional magazine "Footsteps" and began writing articles online in 2010. She earned a Doctor of Podiatric Medicine from Temple University School of Podiatric Medicine and a Bachelor of Arts in biology from William Paterson University.
What Are the Causes of Cramps in Feet?
Foot cramps are painful and can be caused by several different conditions. Photo Credit woman legs over white image by Anatoly Tiplyashin from <a href='http://www.fotolia.com'>Fotolia.com</a>

A cramp is a sudden involuntary contraction of any muscle, including those in the feet, which can be extremely painful. A muscle cramp, commonly called a charley horse, occurs when the muscle cramps and does not relax, according to MedlinePlus. The muscle can get so tight it feels like a knot underneath the skin. Although painful, muscle cramps occur in healthy people, but may be the result of an underlying disease or condition that requires medical treatment.

Exercise and Dehydration

Long periods of exertion or exercise, particularly in hot weather, can cause cramping in the small muscles of the foot. According to the Merck Manuals Online, overusing a muscle, being dehydrated or having to hold the foot in one position for an extended time can cause cramping. Spontaneous cramping of the foot and toes can occur at night while sleeping and is called a nocturnal cramp. Nocturnal cramps cause the foot and toes to curl downward. Stretching can bring relief, as it makes it less likely for muscles to cramp spontaneously.

Underlying Disease

Most foot cramps are painful, but harmless, however, in some cases they can be the result of an underlying disease. According to MayoClinic.com, poor circulation to the feet can cause cramping while walking due to the muscles not getting enough blood supply from narrowed arteries. These cramps will go away with rest. Other medical conditions that can cause foot cramps include underactive thyroid, or hypothyroidism, kidney disease, especially when on dialysis, and cirrhosis of the liver due to alcoholism. It is important to treat the underlying disease to relieve any cramping.

Nutritional Deficiency

Certain nutritional deficiencies can cause foot cramps to occur. According to MayoClinic.com, being deficient in some minerals, particularly potassium, can cause muscle cramps. Too much or too little salt in the diet can cause cramping, as can reduced levels of calcium and magnesium. Replacement of depleted minerals, under a doctor's advice, can clear up the cramping.

Side Effects of Some Medications

Some medications can produce muscle cramps in the feet as a side effect. Foot Pain Explained states diuretics, also called water pills, can cause cramping to occur. Other medications that can induce foot cramps include statins, taken for high cholesterol; lithium, taken for bipolar disorder; cimetidine, for ulcer management; and terbutaline, for asthma. Morphine withdrawal can also cause cramping. Speak with your doctor if you experience foot cramps as a side effect of your medication.

Pregnancy and Hormonal Changes

Foot cramps can occur more frequently in the second and third trimester of pregnancy. They may be the result of hormonal changes or an increase in retained water, which causes edema in the feet and ankles and decreased circulation. Foot cramps during pregnancy tend to occur more at night, and the Dr Foot website recommends getting up and walking to relieve the cramps and elevating your feet during the day to reduce swelling.

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