What is a charley horse?

Dr. Mehmet Oz, MD

Cardiology (Cardiovascular Disease)

A charley horse is nothing more than a muscle spasm that, while quick and harmless, can still be very painful. Muscle spasms commonly occur when your electrolytes are imbalanced, you’re dehydrated, or that muscle is overworked. For instance, when muscles suddenly contract, your body’s electrolytes can become imbalanced, causing nerves to fire uncontrollably. This is when charley horses happen.
This content originally appeared on doctoroz.com

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.

Muscle Spasm

Muscle spasms can be harmless, caused by a minor muscle contraction, or the sign of something more serious. This muscle contraction can occur in various parts of the body, too. A common leg muscle spasm is known as a charley horse, and it typically happens at night due to dehydration or an imbalance of electrolytes. Some people also experience back spasms when their muscles and spine are out of sync. Learn more about causes and treatment for muscle spasms with expert advice from Sharecare.

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