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Leg Cramp Causes Explained: Your Guide

Can understanding how leg cramps feel, their causes, and prevention help individuals with treatment options?

Leg Cramp Causes

A leg cramp is an involuntary contraction of the muscles in the leg, typically the calf muscle. It causes a sudden, sharp, and painful tightening of the muscle. They commonly occur from

  • Dehydration
  • Muscle overexertion
  • They can be a symptom of an underlying health condition, such as type 2 diabetes or kidney failure.
  • They can also be a side effect of certain medications.

Sensation

Leg cramps typically cause sudden, severe pain in the affected muscle. Individuals may also feel a hard knot or twitching of the muscle. The calf muscles are the most common site. (Harvard Health Publishing, 2024)

Causes

The underlying cause of leg cramps isn’t always known. However, work, lifestyle factors, and medical conditions can play a role. Common causes include:

  • Muscle fatigue from overuse
  • Electrolyte imbalances (e.g., potassium, magnesium)
  • Dehydration
  • Poor circulation
  • Nerve damage
  • Certain medications (e.g., statins, diuretics)

Lifestyle Risk Factors

Certain lifestyle factors and other physical characteristics can increase the risk of leg cramps and can include: (Harvard Health Publishing, 2024) (National Library of Medicine, 2020)

  • Age (those 60 and over are affected more often than younger individuals)
  • Exercising in a hot environment
  • Exercising for extended periods
  • Obesity
  • Pregnancy

Medical Factors

Leg cramps are also associated with certain medical conditions and treatments for illness. Examples include: (Maughan R. J. & Shirreffs S. M. 2019) (Garrison, S. R. et al., 2020)

  • Pinched nerves in the lower back
  • Decreased blood circulation in the legs
  • Spinal cord injury
  • Certain medications (such as statins and diuretics)
  • Allergies
  • Gastrointestinal disease (digestive tract disorders)
  • Cardiovascular disease
  • Liver failure
  • Cancer
  • Dialysis – treatment to remove excess fluid from the blood when kidneys fail.
  • Respiratory diseases of the lungs and airways
  • Amyotrophic lateral sclerosis (ALS, or Lou Gehrig’s disease, a neurological condition affecting the brain, nerves, and muscles)

Self-Care

Leg cramps often go away on their own after a few minutes. However, other self-care can help. Recommendations: (Harvard Health Publishing, 2024)

Change Body Positions

  • Moving can help relieve tension and pain.
  • If the leg cramps happen at night, stand up and take a few steps.

Massage

  • Gently rubbing the cramped muscle can help it relax.

Stretch

  • Stretching the cramping muscle can help it relax.

Apply Heat

  • If the leg cramp lasts more than a few minutes, apply a heating pad or take a warm shower to increase blood circulation to and around the muscle to help it relax.

Treatment

There are no medications specifically for treating leg cramps. However, if symptoms are caused by another medical condition, treating the underlying condition might help reduce cramp frequency. Dehydration or low electrolytes can cause leg cramps; in these cases, drinking water or electrolyte-infused beverages can help. If cramps are related to overexercising, consider reducing the intensity of your activity or exercising in a cooler environment. (Maughan R. J. & Shirreffs S. M. 2019) Magnesium supplements are usually marketed to relieve muscle cramps; they are not proven to alleviate them. (Garrison, S. R. et al., 2020)

Exercises and Stretches

Knowing which muscle to target when stretching the leg is important. If the cramp does not resolve after the first stretch attempt, try again.

Hamstring Muscle

Pain in the back of the thigh. Here’s how to stretch the hamstrings (American Academy of Orthopaedic Surgeons, 2018)

  • Lie on your back.
  • Bend both knees and rest your feet on the ground or mattress if the cramp occurs at night.
  • On the leg that is cramping, bring the knee toward your chest.
  • Interlock the fingers behind your knee.
  • Slowly straighten the knee and pull your leg toward your head until you feel a stretching sensation along the back of the thigh.
  • Hold for 30 to 60 seconds.

Calf Muscle

The calf muscle is the most common for leg cramps. To stretch the calf muscle (American Academy of Orthopaedic Surgeons, 2018)

  • Stand facing a wall.
  • Place palms flat against the wall at shoulder height.
  • Step the cramping leg away from the wall around 12 to 18 inches.
  • Keep your heels flat on the floor.
  • Keeping the back leg straight, bend the front knee slowly and lean forward until you feel a stretch along the calf.
  • Hold for 30 to 60 seconds.

Prevention

They can’t always be prevented. However, if they are related to dehydration or other lifestyle factors, individuals may be able to prevent them from occurring or decrease the frequency. Try the following: (Harvard Health Publishing, 2024)

  • Drink plenty of water.
  • Stretch the leg muscles before you go to bed.
  • Try drinking a beverage with electrolytes for longer workouts or activities in hot weather.
  • Warm up before exercise, such as with a slow jog, before getting into more intense exercises.
  • Properly cool down after a workout.
  • Stretch the leg muscles before and after exercising.
  • Maintain a healthy body weight.

Contact a Healthcare Provider

Leg cramps can sometimes signify something more serious than a Charley horse. See a healthcare provider if any of the following symptoms present (National Library of Medicine, 2020)

  • Change in skin color, including redness or a deeper tone than normal
  • Cramps that last more than a few minutes or occur frequently
  • Muscle weakness
  • Severe pain from the cramps
  • Swelling
  • Warm skin

Injury Medical Chiropractic & Functional Medicine Clinic

Talk to a healthcare provider about leg cramps to learn what interventions would help the most. Injury Medical Chiropractic and Functional Medicine Clinic works with primary healthcare providers and specialists to develop an optimal health and wellness solution. We focus on what works for you to relieve pain, restore function, and prevent injury. Regarding musculoskeletal pain, specialists like chiropractors, acupuncturists, and massage therapists can help mitigate the pain through spinal adjustments that help the body realign itself. They can also work with other medical professionals to integrate a treatment plan to resolve musculoskeletal issues.


Is Motion Key to Healing?


References

Harvard Health Publishing. (2024). How to get rid of muscle cramps in your legs. https://www.health.harvard.edu/pain/how-to-get-rid-of-muscle-cramps-in-your-legs

National Library of Medicine. (2020). Muscle cramps. Retrieved from https://medlineplus.gov/musclecramps.html

Maughan, R. J., & Shirreffs, S. M. (2019). Muscle Cramping During Exercise: Causes, Solutions, and Questions Remaining. Sports Medicine (Auckland, N.Z.), 49(Suppl 2), 115–124. https://doi.org/10.1007/s40279-019-01162-1

Garrison, S. R., Korownyk, C. S., Kolber, M. R., Allan, G. M., Musini, V. M., Sekhon, R. K., & Dugré, N. (2020). Magnesium for skeletal muscle cramps. The Cochrane database of systematic reviews, 9(9), CD009402. https://doi.org/10.1002/14651858.CD009402.pub3

American Academy of Orthopaedic Surgeons. (2018). Knee conditioning program. https://orthoinfo.aaos.org/en/recovery/knee-conditioning-program/

Muscle Relaxers for Back Spasms: What You Need to Know

For individuals who injure their neck or back, the muscles may spasm or seize up, making it difficult to get through the day, exercises, physical activities, etc. Can skeletal muscle relaxers help relieve pain and reduce frequency?

Back Spasms Muscle Relaxers

Back muscle spasms are common back pain that feels like a sudden tightness or contraction in the back muscles. They can range from minor twinges to severe pain.

Causes

  • Poor posture: Sitting or standing with bad posture can strain the back muscles.
  • Overuse: Picking something up, bending, or lifting can cause a spasm.
  • Dehydration: Not drinking enough water can cause electrolyte imbalances, leading to spasms.
  • Underlying conditions: A herniated disc or degenerative disc disease can cause back spasms.
  • Muscle imbalances: Weak muscles or muscles that are too tight can cause spasms.

Treatments

  • Home treatments: Apply heat or ice, take over-the-counter pain medication, try gentle stretching, or massage the area.
  • Exercise: Improve your back’s strength and flexibility with exercise or physical therapy.
  • Hydration and nutrition: Drink enough water and eat foods rich in magnesium and calcium.
  • Chiropractic Adjustments: These can realign the spine to the correct position and muscles to relax.
  • Non-surgical Decompression: Decompression of the spine will allow more blood and nutrients to heal painful areas.

Skeletal Muscle Relaxers

A healthcare provider may prescribe skeletal muscle relaxers. These medications are not available over the counter and must be prescribed by a healthcare provider.

  • Skeletal muscle relaxers will probably cause drowsiness.
  • Individuals should not drive, operate heavy machinery, or engage in other physical activities when taking back spasm muscle relaxers.
  • Skeletal muscle relaxers are not recommended for 65 or older because safer, effective alternatives exist.
  • Also, women who are pregnant or breastfeeding should not take these medications.
  • Discuss these issues with your healthcare provider.

Carisoprodol 

Carisoprodol is available generically and as Soma and Vanadom brands. It works by suppressing nerve impulses located in the brain and spinal cord. Healthcare providers prescribe this medication in combination with physical therapy for the healing release of any muscle spasm and management of musculoskeletal injuries and/or pain. (Witenko C. et al., 2014) It’s not about having to continue taking the medication to feel better but more as a jump start to help with the physical therapy program.

  • Back muscle spasms are a perfect example of a condition that may benefit from carisoprodol in the short term.
  • Carisoprodol can be habit-forming.
  • Be sure to talk to a healthcare provider before suddenly going off this medication.
  • Carisoprodol can cause side effects that may impair thinking or reactions.
  • Avoid drinking alcohol as it may increase drowsiness and dizziness that are often caused by carisoprodol. (Zacny J. P., Paice J. A., & Coalson D. W. 2012)
  • Inform your healthcare provider of any drug allergies, kidney disease, or liver disease, or if you get seizures.

Cyclobenzaprine

Cyclobenzaprine is available as Amrix and in generic form. Like other muscle relaxers, cyclobenzaprine may cause dizziness or drowsiness. The sedation effects are how it works on painful, tension-filled muscles. Cyclobenzaprine is used together with physical therapy to treat skeletal muscle-related conditions and/or injuries, especially when pain or spasm is involved. When used in conjunction with physical therapy, it can help expedite recovery.

  • Cyclobenzaprine is chemically related to tricyclic antidepressants.
  • Although it is considered a derivative of the tricyclic antidepressant class, it does not pose the same risk to liver health.
  • According to the National Institutes of Health, reasons not to take this medication include having a thyroid disorder, heart block, congestive heart failure, a heart rhythm disorder, or having recently had a heart attack. (Witenko C. et al., 2014)

Metaxalone

Skelaxin is the brand name for metaxalone. As with the other muscle relaxers, metaxalone is used in combination with physical therapy and rest when muscles get too tight. (Witenko C. et al., 2014) It works by suppressing nerve impulses in the brain and spinal cord. In addition to older individuals and pregnant women, metaxalone is usually not prescribed for those with kidney disease, liver disease, seizures, or blood disorders.

Injury Medical Chiropractic and Functional Medicine Clinic

Back spasms and muscle relaxers could help individuals, along with a personalized physical therapy treatment program. Injury Medical Chiropractic and Functional Medicine Clinic works with primary healthcare providers and specialists to build optimal health and wellness solutions. We focus on what works for you to relieve pain, restore function, prevent injury, and help mitigate issues through adjustments that help the body realign itself. They can also work with other medical professionals to integrate a treatment plan to resolve musculoskeletal problems.


Thoracic Spine Pain


References

Witenko, C., Moorman-Li, R., Motycka, C., Duane, K., Hincapie-Castillo, J., Leonard, P., & Valaer, C. (2014). Considerations for the appropriate use of skeletal muscle relaxants for the management of acute low back pain. P & T: a peer-reviewed journal for formulary management, 39(6), 427–435.

Zacny, J. P., Paice, J. A., & Coalson, D. W. (2012). Subjective and psychomotor effects of carisoprodol in combination with oxycodone in healthy volunteers. Drug and alcohol dependence, 120(1-3), 229–232. https://doi.org/10.1016/j.drugalcdep.2011.07.006