Of course, I’m talking about a stiff neck, back or, heaven forbid, a Charley-horse! What causes those awful muscle spasms and can you prevent them?
Skeletal muscles are the muscles attached to our bones that are generally under our conscious control. We use these muscles to move parts of our bodies and to make facial expressions, such as smiling.
A muscle spasm, or muscle cramp, is an involuntary contraction of a skeletal muscle. Spasms of the skeletal muscles are often caused by overuse and muscle fatigue, by electrolyte imbalances or can be associated with a previous injury. Usually they occur abruptly and don’t last long. If they are extremely painful and don’t resolve on their own, you should seek a medical assessment to look for possible underlying causes.
Causes
Although the precise cause of a muscle spasm is not always known, electrolyte imbalances are believed to contribute. Spasms occur more frequently when exercising or doing physical work in hot weather, when dehydration and electrolyte loss occurs due to sweating. Muscles require enough water, glucose, sodium, potassium, calcium and magnesium to allow the muscle proteins to develop an organized contraction. A lack of any of these elements can cause the muscle to become irritable and develop spasm. The muscle soreness and increased risk of spasm that occur after new or increased exercise is thought to be due to a lack of electrolytes. With continued exercise, blood flow capability increases, bringing increased electrolytes, nutrients and oxygen to the muscle, and soreness no longer occurs.
Other causes of muscle spasms include:
decreased blood supply to the muscle, due to narrowing or disease of the arteries,
arthritis or other injury of a joint (where muscles spasm to try to support the damaged joint),
obesity, where increased weight can cause stress and strain of the core muscles of the trunk, leading to spasms of the neck and upper or lower back
diseases like diabetes, anemia, kidney disease and thyroid or other hormone issues (can potentially disrupt electrolyte balance)
diseases of the nervous system, such as amyotrophic lateral sclerosis (ALS), multiple sclerosis (MS), or spinal cord injury
Treatment
If a skeletal muscle goes into spasm, the initial treatment is to gently stretch the muscle lengthwise to break the spasm and resolve the acute situation. A physiotherapist or massage therapist can teach you exercises to stretch less obvious muscles, relieving spasm and pain. Heat and anti-inflammatory medications, such as ibuprofen (Motrin, Advil) or diclofenac (Voltaren Gel) can also be helpful for short-term pain relief. Your doctor may prescribe stronger pain medication and/or a muscle relaxant in more severe situations when the spasm does not readily subside. In Canada, the muscle relaxant, methocarbamol (Robaxicet and generic versions) can be bought without a prescription.
Quinine, an anti-malaria drug, is a very effective medication for nocturnal leg spasms and was used for many years for prevention of the nighttime “Charley-horse”. However, quinine was found to have serious side effects (vision problems and abnormal bleeding) and is only used now in severe cases where other medications do not help.
Trigger Points
A “trigger point” is a small area of contraction in a muscle, that shortens and weakens it, creating pain where the muscle attaches. The trigger point is often not located where the muscle pain is perceived. In medical terms, this is described as “referred pain”, much like the way a heart attack (damage in the heart muscle) is often felt in the left shoulder or arm. A trigger point is defined as a “highly irritable localized spot of exquisite tenderness in a nodule in a palpable taut band of muscle tissue” -- so it's an area that is painful when pressed and can be felt as a lump under the skin in the muscle. Drs. Travell and Simons wrote extensively about trigger points starting in the 1940s, mapping out common muscle trigger points and the areas where pain from each is commonly felt. Their work is the basis for today’s therapeutic massage and for some physiotherapy.
Massage, either by a professional or self-massage, can be helpful for muscle spasm. Massage can increase circulation to the muscle, bringing nutrients and removing breakdown products. Pressure on the trigger point of a muscle can also help to relax a spasm and trigger points are sometimes used as the site for acupuncture or accupressure. If you are interested in learning self-massage for relief of pain from chronic muscle spasms, I could suggest The Trigger Point Therapy Workbook, by Clair Davies, an excellent self-treatment guide that I have used with my clients (and myself!) for many years.
Conclusion...
So, if you are exercising or doing physical work, especially in a hot environment, be sure to drink extra water to replace fluids you are losing. If you are prone to muscle spasms, consider also replacing minerals, for example, by consuming a supplement or electrolyte containing foods or drink during activities on warm days. Ensure your diet contains adequate minerals: calcium, magnesium, sodium and potassium. If the spasm lasts more than a few days and is not due to an obvious overuse of the muscle or dehydration, see your doctor or physical/massage therapist and, together, look for an underlying cause.
