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Leg cramps are sudden, painful, and involuntary contractions of one or more muscles, most commonly affecting the legs. These cramps can last anywhere from a few seconds to several minutes and are also called charley horses.

Leg cramps disrupt sleep, interfere with daily activities and reduce overall quality of life. According to the American Academy of Family Physicians, up to 60 percent of adults experience nocturnal leg cramps, with prevalence increasing with age.

While leg cramps are generally harmless, they can leave the affected muscles sore or tender for hours and limit movement. If you experience frequent leg cramps, meaning you have three or more episodes per week, it may be a sign of an underlying vein condition and should be evaluated by a specialist. You can start by calling Physicians Vein Clinics at 888-782-8346 or scheduling an appointment online.

What Are the Causes and Risk Factors of Leg Cramps?

Chronic Venous Insufficiency

Chronic venous insufficiency develops when the valves inside your leg stop working properly because of congenital malformations, injury, scar tissue and blood clots. These valves are meant to prevent blood from flowing backward, and when they malfunction, blood can pool in the legs rather than returning effectively to the heart. As pressure builds inside the veins, it reduces healthy circulation to the surrounding tissues and muscles. This can irritate muscle tissue and cause recurrent cramping. Patients with this condition may also notice swelling and varicose veins, among other symptoms.

Pregnancy

Pregnancy, while not a direct cause of leg cramps, does increase the risk of developing vein concerns. During pregnancy, blood volume increases, and the growing uterus puts more pressure on the veins in the pelvis and legs. Other factors that can make cramps more likely during pregnancy are hormonal changes and swelling in the legs and ankles.

Intense Exercise

Prolonged exercise can trigger leg cramps because of muscle fatigue. Muscles that are pushed beyond their usual limits may contract involuntarily. Heavy activity may also cause temporary imbalances in electrolytes like potassium or magnesium that can interfere with normal muscle signaling and cause them to tighten.

Dehydration

Electrolytes can also become imbalanced when the body is dehydrated. Drinking enough water is important for individuals with chronic venous insufficiency, varicose veins and other vein diseases. Hydration keeps the blood thin and helps make muscles strong enough to effectively contract and push blood upward.

Side Effects of Medication

Certain medications can increase the risk of leg cramps. Diuretics, which decrease fluid in the body, can lower potassium and magnesium, triggering muscle spasms. Some blood pressure medications and cholesterol-lowering drugs have also been associated with muscle discomfort in some patients. If cramping starts after starting a new prescription, we will carefully review this possibility during your evaluation.

Age

Age is a risk factor for leg cramps, which affect individuals over 50 more than younger patients. As you get older, muscle mass naturally declines and circulation slows. Vein valve function can also weaken over time and increase the risk of chronic venous insufficiency. These changes make cramping more likely, particularly at night or after a long time of sitting or standing.

Symptoms of Leg Cramps

Leg cramps most often affect the calf muscle, which spans the back of each leg from the ankle to the knee.

Patients describe muscle spasms as sudden, clenched and sharp pain. You might also feel or see a hard lump of muscle tissue under the skin.

Nocturnal leg cramps can be painful enough to wake one up in the middle of the night.

Leg cramps can be severely uncomfortable or even unbearable. Most of the time, the muscle relaxes in 10 minutes, but the sore and hurt can last for hours or till the next day.

What Causes Leg Cramps?

Common causes of leg cramps include:

  • Pregnancy
  • Intense exercises
  • Dehydration
  • Side effect of medication
  • Age. Older people are more likely to get leg cramps due to the loss of muscle mass.

Most leg cramps are harmless, but they may indicate an underlying medical condition of venous insufficiency or a circulatory disorder.

When to See a Vein Doctor Near Me

Muscle cramps are often merely an uncomfortable inconvenience, but you should consult a vein specialist if your cramps cause frequent and severe discomfort, occur 3 or more times a week, happen for no obvious reason, or are associated with other symptoms, including:

  • Restless legs
  • Spider veins
  • Varicose veins
  • Leg aching
  • Ankle and leg swelling
  • Skin discoloration
  • Itching and burning
  • Skin rash like eczema

Why Physicians Vein Clinics

  • Board-certified vein specialists who diagnose and treat vein disease every day
  • 14 convenient vein centers across South Dakota, North Dakota, Iowa, Illinois, Pennsylvania and Minnesota
  • All vein treatments are minimally invasive and performed in-office with little to no downtime
  • Free vein screening available with no referral required, and most insurance plans accepted
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How Are Muscle Cramps Treated?

Home Remedies

You can relieve muscle cramps with home remedies such as:

  • Rubbing or massaging the area until the pain subsides
  • Stretching
  • Staying hydrated
  • Straightening or elevating your legs before going to be

If muscle cramping does not go away with these basic strategies, a vein condition may be the cause. We recommend you consult a vein specialist for medical advice if your leg cramps are happening frequently and affecting your quality of life.

Compression Therapy

Compression therapy is often used as a first step to treating vein conditions and may continue to be used after other treatments. We prescribe 20 to 30mmHg graduated compression stockings or higher for patients with chronic venous insufficiency, spider veins, varicose veins and other concerns to improve blood flow. We may recommend combining compression therapy with other lifestyle changes, like increasing your movement throughout the day, drinking more water and elevating the legs.

Endovenous Radiofrequency Ablation

Endovenous radiofrequency ablation is one of our minimally invasive treatments for closing malfunctioning veins. During this treatment, we insert a thin catheter into the vein and apply thermal energy to cause the vein to collapse. Once the unhealthy vein is closed, blood can circulate more freely through the legs, and there is less pressure and muscle irritation.

Varithena

Varithena is an injectable foam treatment commonly used for diseased veins. The medication is placed directly into the vein, where it irritates the lining and causes it to collapse and close. Varithena can be used for certain patients to help with muscle cramping when vein conditions are the root cause.

VenaSeal

For situations where a non-thermal and non-sclerosant option is desired, we can use VenaSeal. Instead of heat or solutions that irritate the lining of the veins, VenaSeal uses a type of medical glue to close the vein. We place a small catheter into the vein, then apply gentle pressure from the outside as we guide it along, helping the vein seal close evenly. Muscle cramping and other symptoms can begin to improve soon after circulation is restored to the area.

Sclerotherapy

Sclerotherapy treats smaller surface veins and other veins that may be contributing to muscle cramps. A solution is injected into the vein to cause it to close and gradually fade. Reducing abnormal circulation with this treatment can lower venous pressure and decrease the frequency of cramping in patients with underlying venous insufficiency.

Ambulatory Phlebectomy

When bulging surface varicose veins are a source of symptoms, we may recommend ambulatory phlebectomy. We remove the problematic vein segments through very small openings in the skin. As circulation improves, patients often experience relief from heaviness and a reduction in recurring muscle cramps.

Find a Clinic Near You

Frequent leg cramps can be more than just a nuisance, especially when they disrupt sleep or daily activities. If you are experiencing ongoing muscle cramping in your legs, a free screening with one of our vein specialists can help identify whether an underlying vein condition may be contributing to your symptoms. At Physicians Vein Clinics, we use advanced diagnostic tools and a patient-centered approach to recommend appropriate treatment options. Schedule your free screening today and take the first step toward lasting relief.

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FAQs About Muscle Cramps

How are venous causes for muscle cramps diagnosed?

At our vein centers, we offer a free vein screening for every patient. Our experts will assess your symptoms, examine your legs and perform a free screening to determine whether vascular disease is the cause. If your leg cramps are not associated with vascular disease, our board-certified vein doctors would provide suggestions on how to manage your lifestyle (diet, weight, exercise) to manage muscle fatigue and prevent muscle spasms.

What is vascular disease?

Venous insufficiency affects about 80 million Americans. The symptoms of vein disease include varicose veins, spider veins, deep vein thrombosis and other vein-related problems.
It’s important that you receive a diagnosis and treatment at the earliest stage. Venous issues can worsen over time and cause significant damage to the skin, and may pose a life-threatening issue.

Our vein clinics offer minimally invasive treatments for all types and symptoms of vein diseases. Treatment will vary depending on the severity and nature of the disease. Procedures include Sclerotherapy, Ambulatory Phlebectomy, and Varithena.

Can leg cramps be related to venous disease even if there are no visible veins?

Venous disease can be present without any visible varicose veins. While many patients with CVI also have varicose veins, not everyone presents with this sign. It is always worth having an assessment for vein disease if you have symptoms like muscle cramps and leg aching.

Can untreated venous insufficiency make muscle cramps worse?

Untreated venous insufficiency can make muscle cramps and other symptoms worse. Ongoing blood pooling and increased pressure can continue to irritate the muscles and deprive the area of oxygen and all of the nutrients your tissues need to stay healthy. Other symptoms may also progress, such as swelling and heaviness.