Before we begin: Have you ever had sudden, painful cramps in a muscle? These muscle spasms (also called charley horse) are very common. Learn how to relieve the pain.
This tutorial walks you through everything you need to know about muscle cramps. We explain it in plain language, step by step, so whether you are a student, a patient, or simply curious, you will come away with a solid understanding.
We cover what it is, why it matters, how it is diagnosed, and what you can do about it. Key facts are called out along the way.
What are muscle cramps? Muscle cramps are sudden, involuntary contractions or spasms in one or more of your muscles. They are very common and often occur after exercise. Some people get muscle cramps, especially leg cramps, at night. They can be painful, and they may last a few seconds to several minutes.
You can have a cramp in any muscle, but they happen most often in the:
Thighs
Feet
Hands
Arms
Abdomen
Area along your ribcage
What causes muscle cramps? Causes of muscle cramps include:
Straining or overusing a muscle. This is the most common cause.
Compression of your nerves, from problems such as a spinal cord injury or a pinched nerve in the neck or back
Dehydration
Low levels of electrolytes such as magnesium, potassium, or calcium
Not enough blood getting to your muscles
Pregnancy
Certain medicines
Getting dialysis
Sometimes the cause of muscle cramps is unknown.
Who is at risk for muscle cramps? Anyone can get muscle cramps, but they are more common in some people:
Older adults
People who are overweight
Athletes
Pregnant women
People with certain medical conditions, such as thyroid and nerve disorders
When do I need to see a health care provider for muscle cramps? Muscle cramps are usually harmless, and they go away after a few minutes. But you should contact your health care provider if the cramps:
Are severe
Happen frequently
Don’t get better with stretching and drinking enough fluids
Last a long time
Are accompanied by swelling, redness, or a feeling of warmth
Are accompanied by muscle weakness
What are the treatments for muscle cramps? You usually don’t need treatment for muscle cramps. You may be able to find some relief from cramps by:
Stretching or gently massaging the muscle
Applying heat when the muscle is tight and ice when the muscle is sore
Getting more fluids if you are dehydrated
If another medical problem is causing the cramps, treating that problem will likely help. There are medicines that providers sometimes prescribe to prevent cramps, but they are not always effective and may cause side effects. Talk to your provider about the risks and benefits of medicines.
Can muscle cramps be prevented? To prevent muscle cramps, you can:
Stretch your muscles, especially before exercising. If you often get leg cramps at night, stretch your leg muscles before bed.
Drink plenty of liquids. If you do intense exercise or exercise in the heat, sports drinks can help you replace electrolytes.
Also known as: Charley horse.
Related topics: Charley Horse, Cramps, Leg Cramps.
Categories: Bones, Joints and Muscles.
Source: National Institutes of Health — National Institute of Arthritis and Musculoskeletal and Skin Diseases.
Key Takeaways
Understanding muscle cramps is an important part of taking charge of your health. Here is what to remember:
- Know the signs — Recognizing early symptoms can lead to earlier diagnosis and better outcomes.
- Talk to your provider — If you have concerns or a family history of this condition, bring it up at your next checkup.
- Stay informed — Medical knowledge evolves. Keep learning and asking questions.
- You are not alone — Many people deal with this condition. Support groups and educational resources can help.