![]() ![]() A temporary hard lump or twitching under the skin.Sudden pain and tightness in a muscle, typically in your calf.Cramps can also be a side effect of medicines like statins, which are used to treat high cholesterol. Older muscles tire more easily, and they become increasingly sensitive to lower fluid volumes in the body. Age is another factor, with cramps becoming more frequent in middle age and beyond. The risk of a cramp increases during pregnancy, possibly because of circulatory changes and increased stress on the muscles from a growing belly. A deficiency of electrolytes such as magnesium or potassium in your diet can lead to more frequent cramping, by preventing your muscles from fully relaxing. Muscles that are tired or dehydrated become irritated and are more likely to cramp up. Exercise is a common trigger, especially after you've exercised for a long period of time or in the heat. Sometimes there is no obvious cause for a cramp. A sudden, painful muscle spasm in the leg is called a charley horse, which legend has it is named after baseball player Charlie "Hoss" Radbourn, who reportedly suffered from frequent cramps back in the 1880s. They can be mild, or intense enough to wake you out of a sound sleep. Cramps can last anywhere from a few seconds to several minutes. A cramp is a sudden, involuntary contraction (tightening) of one of these muscles, typically in your calf. The muscles in your legs are made up of bundles of fibers that alternately contract and expand to produce movement. ![]()
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